What is the meaning of Biff?

A sudden, sharp blow or punch.

A wipeout.

(Can we verify this sense?) Euphemistic form of bitch.

To punch or hit.

To discard; to throw out; to throw away.

To wipe out; to faceplant; to fall.

To move quickly.

The sound of a person being punched or hit.

Alternative form of bif

a steak

a steak

a beef steak

a large and very muscular person; a beefy guy, a beefcake

Source: wiktionary.org