Definitionsbonk , slang word meaning to copulate. Colloquial in Britain, less popular in the US and Canada. See copulation for synonyms.
Quote: Cher Hamilton's (Alicia Silverstone) about her Wendell Hall (Wallace Shawn) in Clueless (1995): ' Here's the 4-1-1 on Mr. Hall. He's single, he's forty-seven and he earns Mayan ducats at a thankless job. What that man needs is a good, healthy boink fest.'