n. a hard blow. : She planted a hard wallop on his right shoulder.
tv. to strike someone or something hard. : The door swung open and walloped me in the back.
n. influence; pull; clout. : I don't have enough wallop to make that kind of demand.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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