BIFF
punch, clout, poke, lick, biff, slug
(noun) (boxing) a blow with the fist; “I gave him a clout on his nose”
pummel, pommel, biff
(verb) strike, usually with the fist; “The pedestrians pummeled the demonstrators”
Source: WordNet® 3.1
Noun
biff (plural biffs)
(informal) A sudden, sharp blow or punch.
(informal, sports) A wipeout.
Verb
biff (third-person singular simple present biffs, present participle biffing, simple past and past participle biffed)
(informal, transitive) To punch or hit.
(NZ, slang, transitive) To discard; to throw out; to throw away.
(informal, sports) To wipe out; to faceplant; to fall.
Source: Wiktionary