biff 1 
(bĭf) Informal
(bĭf) Informal tr.v. biffed, biff·ing, biffs
To strike or punch.
n.
A blow or punch.
[From English biff, interjection, probably of imitative origin.]
- biological clock
- biological computing
- biological control
- biological drug
- biological half-life
- biologically
- biological oxygen demand
- biological response modifier
- biological warfare
- biological weapon
- biologist
- biology
- bioluminescence
- bioluminescent
- biolysis
- biolytic
- biomagnetism
- biomagnification
- biomarker
- biomass
- biomaterial
- biomathematical
- biomathematician
- biomathematics
- biome