As nouns the difference between biff and biffy
is that biff is a sudden, sharp blow or punch while biffy is (us) a toilet.
As a verb biff
is to strike such a blow.
biff
English
Noun
(
en noun)
A sudden, sharp blow or punch.
(sports): A wipeout.
Verb
(
en verb)
To strike such a blow.
(NZ, slang) To discard; to throw out; to throw away.
(sports) To wipe out; to faceplant; to fall.
biffy
English
Noun
(biffies)
(US) A toilet
(US) An outhouse