informal
■ verb ( ~s , ~ing , ~ed )
1》 strike or hit very hard.
↘heavily defeat (an opponent).
2》 [as adjective ~ing ] strikingly large.
■ noun
1》 a heavy blow or punch.
↘ chiefly N. Amer. a powerful effect.
2》 Brit. alcoholic drink, especially beer.
Derivatives
~ing noun
Origin
ME (denoting a horse's gallop): from Old North. Fr. walop (n.), waloper (v.), perh. from a Gmc phr. meaning 'run well', from the bases of well 1 and leap ; cf. gallop .