A blow or punch. [From English biff, interjection, probably of imitative origin.]

Where did the phrase Biffed it come from?

"to hit," 1877, imitative (as a sound effect by 1847). Related: Biffed; biffing.

What does Biffed mean in slang?

Meaning of biffed in English

to hit someone, especially with the fist (= closed hand): I biffed him on the jaw. Synonyms. clout informal. pummel.