1. a thief or dishonest person
Usage: informal; chiefly North American; from Yiddish

Examples

• The goniff was caught stealing from the jewelry store.
• Don't trust that goniff—he'll cheat you out of your money.
• The police arrested the goniff after he robbed three houses.
• That used car salesman is a real goniff if you ask me.
• The goniff slipped out of the building with the stolen goods.