To hit or strike something, especially forcefully but without careful aim; a punch or blow.
Imitative origin from the sound 'biff' representing a hitting sound. Popular in American slang from the early 20th century, often used in comic books.
Comic books loved the word 'biff'—it appeared as an onomatopoeia in Batman comics (along with 'pow,' 'bang,' and 'kaboom'), which helped make it such a fun and recognizable word!
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