'goniff' definitions:

Definition of 'goniff'

From: WordNet
noun
(Yiddish) a thief or dishonest person or scoundrel (often used as a general term of abuse) [syn: gonif, goniff, ganef, ganof]

Definition of 'goniff'

From: GCIDE
  • goniff \gon"iff\, n. [From Yiddish, prob. fr. Heb. gann[=a]bh thief.] A pickpocket or thief. [Also spelled ganef, gonif, and gonoph.] [Eng. Slang] [1913 Webster +PJC]

Definition of 'goniff'

From: GCIDE
  • Gonoph \Gon"oph\, n. [From Yiddish, prob. fr. Heb. gann[=a]bh thief.] A pickpocket or thief. [Also spelled ganef, gonif, and goniff.] [Eng. Slang] --Dickens. [1913 Webster]