bumfeg

transitive verb (bumfegged ; bumfegged ; bumfegging ; bumfegs)

Etymology: bum (I) + obsolete feague, fegue to beat, probably from Dutch vegen, literally, to sweep, from Middle Dutch vēghen; akin to Old Saxon fegon to sweep, Middle High German vegen to sweep, clean, Old English fæger beautiful — more at fair

obsolete : thrash