出典:Wiktionary
From Middle English *floggen (suggested by flogge (“hammer, sledge”), from 古期英語 *floggian, a stem variant of Proto-Germanic *flukkōną (“to beat”),[1] itself a secondary zero-grade iterative with unetymological -u-, derived from *flōkaną. The original zero-grade iterative *flakkōną had been misinterpreted as an o-grade. See flack (“to beat”), also as a dialectal noun "a blow, slap". Cognate with Scots flog (“a blow, stripe, flogging”, noun), Scots flog (“thin strip of wood”), Norwegian flak (“a piece torn off, strip”).
Alternatively, a back-formation from flogger, from Low German flogger (“a flail”).
flog (三人称単数 現在形 flogs, 現在分詞 flogging, 過去形および過去分詞形 flogged)
burls
a paste-pot
a plaything with which one trifles for pleasure
ぐぐれ