Etymology
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whop (v.)
"to beat, strike," mid-15c., of imitative origin. Compare Welsh chwap "a stroke," also of imitative origin; also see wap. Related: Whopped; whopping.
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whopper (n.)
1767, "uncommonly large thing," originally and especially an audacious lie, formed as if from whop (v.) "to beat, overcome." Whopping "large, big, impressive" is attested by 1620s.
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