Definition & Meaning of "bonk"in English

What is the origin of the term "bonk" and how is it used?

Bonk is a slang verb that appeared in mid-20th-century English to describe having sexual intercourse. The term is likely an onomatopoeic word, mimicking the sound of something hitting or striking, and later extended metaphorically to sexual activity. Literally, it labels the act of sexual intercourse in a crude, informal manner. Historically, it was informal and playful, often used in casual or light-hearted contexts, and today it remains vulgar and colloquial, generally limited to casual, humorous, or sexual contexts rather than polite or neutral speech.