biff1 /bɪf/ verb 1 [transitiveT] old-fashioned informalHIT to hit someone hard with your fist 〔用拳头〕狠打,猛揍 SYN thump He biffed me on the nose. 他猛击我的鼻子。
2. [intransitiveI] informal to fall or hit something when riding a bicycle, snowboard etc 〔骑自行车或玩单板滑雪等时〕摔下来,撞到某物