Definition of biffed:
(n) :
(informal) A sudden, sharp blow or punch.
(n) :
(informal, sports) A wipeout.
(v) :
(informal, transitive) To punch or hit.
(v) :
(Atlantic Canada, New Zealand, slang, transitive) To discard; to throw out; to throw away.
(v) :
(informal, sports) To wipe out; to faceplant; to fall.
(v) :
(informal) To mess up.