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English word top whack comes from English whack
whack (English)
(UK, usually in the negative) To surpass; to better.. (slang) To kill, bump off.. (sports) To beat convincingly; to thrash.. (transitive, slang) To share or parcel out; often with up.. To hit, slap or strike. (US, obsolete) A deal, an agreement.. (US, slang) An attempt, a chance, a turn, a go, originally an attempt to beat someone or something.. (obsolete) A whack-up: a division of an amount [...]
top whack (English)