biffed is biff's Past Participle

biff

US 
UK [bɪf]
  • n.啪地一击
  • v.(梆地)打
  • Web釜山国际电影节(Busan International Film Festival);北京独立电影展(Beijing Independent Film Festival);Binary Interchange File Format
Simple Present:biffs  Present Participle:biffing  Past Participle:biffed  
n.
1.
〈美俚〉梆地一打,啪地一击
v.
1.
(梆地)打,殴打