Inclusion Criteria:

          -  Histologically confirmed metastatic melanoma (stage IV) or unresectable stage III that
             have progressed on prior PD-1 directed therapy; only patients with BRAF V600 mutated
             melanoma are eligible; please note that patients with brain metastasis are not
             required to have prior PD-1

          -  Prior therapies for metastatic melanoma are allowed, including chemo-, cytokine-,
             immuno, biological and vaccine-therapy as long as they did not include BRAFi, MEKi;
             patients who have progressed on or after receiving anti-PD-1therapy in the adjuvant
             setting are also allowed; prior ipilimumab and/or PD-1 directed therapy will be
             allowed with a washout period of 2 weeks and if all autoimmune adverse events have
             resolved to grade 1 (except endocrine abnormalities that require continuous
             replacement)

          -  Evidence of evaluable disease

          -  Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1

          -  Patients with melanoma brain metastases are allowed. Subjects with brain metastases
             are eligible if:

               -  Metastases have been treated and there is no magnetic resonance imaging (MRI)
                  evidence of progression for 2 weeks after treatment is complete and within 14
                  days of the first dose of nivolumab administration; or

               -  If they are untreated but asymptomatic and have had previous PD-1 treatment; or

               -  If they are untreated and symptomatic but symptoms are controlled on stable or
                  decreasing doses of steroids for 14 days prior to drug administration; or

               -  If they have untreated leptomeningeal disease (LMD) as long as they fulfill all
                  other eligibility requirements.

               -  Note: Patients are excluded if they require high doses of systemic
                  corticosteroids (> 8 mg equivalent of dexamethasone) to control central nervous
                  system (CNS) symptoms.

          -  White blood cells (WBC) >= 2000 /uL (within one week prior to registration)

          -  Neutrophils >= 1500 /uL (within one week prior to registration)

          -  Platelets >= 100 x 10^3 /uL (within one week prior to registration)

          -  Hemoglobin > 9.0 g/dL (within one week prior to registration)

          -  Serum creatinine =< 1.5 x upper limit of normal (ULN) or creatinine clearance (CrCl)
             >= 40 mL/min (if using the Cockcroft-Gault formula) (within one week prior to
             registration)

          -  Aspartate aminotransferase (AST)/alanine aminotransferase (ALT) =< 3 x ULN (within one
             week prior to registration)

          -  Total bilirubin =< 1.5 x ULN (except subjects with Gilbert syndrome, who can have
             total bilirubin < 3.0 mg/dL) (within one week prior to registration)

          -  Women of childbearing potential (WOCBP) must be willing to use 2 methods of birth
             control or be surgically sterile, or abstain from heterosexual activity for the course
             of the study through 23 weeks (30 days plus the time required for nivolumab to undergo
             five half-lives) after the last dose of investigational drug; WOCBP are those who have
             not been surgically sterilized or have not been free from menses for > 1 year

          -  Women of childbearing potential must have a negative serum or urine pregnancy test
             within 72 hours prior to the start of nivolumab

          -  Men who are sexually active with WOCBP must use any contraceptive method with a
             failure rate of less than 1% per year; men receiving nivolumab and who are sexually
             active with WOCBP will be instructed to adhere to contraception for a period of 31
             weeks after the last dose of investigational product; women who are not of
             childbearing potential (i.e., who are postmenopausal or surgically sterile) and
             azoospermic men do not require contraception

          -  Ability to understand and the willingness to sign a written informed consent document

        Exclusion Criteria:

          -  Patients that had grade 3/4 immune-related adverse events (AEs) on ipilimumab that
             required more than 12 weeks of immune suppression with corticosteroids

          -  History of interstitial lung disease or pneumonitis

          -  History of known glucose-6-phosphate dehydrogenase (G6PD) deficiency

          -  Active, known or suspected autoimmune disease; subjects are permitted to enroll if
             they have vitiligo, type I diabetes mellitus, residual hypothyroidism and/or
             hypophysitis due to autoimmune condition only requiring hormone replacement, psoriasis
             not requiring systemic treatment, or conditions not expected to recur in the absence
             of an external trigger

          -  Require systemic treatment with either corticosteroids (> 8 mg daily prednisone
             equivalents) or other immunosuppressive medications within 14 days of study drug
             administration; inhaled or topical steroids and adrenal replacement doses are
             permitted in the absence of active autoimmune disease

          -  Known history of a positive test for hepatitis B virus or hepatitis C virus indicating
             acute or chronic infection

          -  Known history of testing positive for human immunodeficiency virus (HIV) or known
             acquired immunodeficiency syndrome (AIDS); HIV-positive patients on combination
             antiretroviral therapy are ineligible because of the potential for pharmacokinetic
             interactions with dabrafenib and trametinib; in addition, these patients are at
             increased risk of lethal infections when treated with marrow-suppressive therapy;
             appropriate studies will be undertaken in patients receiving combination
             antiretroviral therapy when indicated

          -  History of allergy or adverse drug reaction to the study drug components (nivolumab,
             dabrafenib, or trametinib) or drugs of similar chemical or biologic composition;
             patients with a history of severe hypersensitivity reaction to any monoclonal antibody
             should also be excluded

          -  Patients who have had chemotherapy or radiotherapy within 2 weeks (6 weeks for
             nitrosoureas or mitomycin C) prior to entering the study or those who have not
             recovered from adverse events due to agents administered more than 4 weeks earlier

          -  Uncontrolled intercurrent illness (requiring IV antibiotic treatment) including, but
             not limited to, ongoing or active infection, symptomatic congestive heart failure,
             unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations
             that would limit compliance with study requirements

          -  Pregnant and/or breastfeeding women are excluded from this study; because there is an
             unknown but potential risk for adverse events in nursing infants secondary to
             treatment of the mother with nivolumab, dabrafenib, and trametinib, breastfeeding
             should be discontinued if the mother is treated with nivolumab, dabrafenib, and
             trametinib; these potential risks may also apply to other agents used in this study