tv. & in. to vomit (something). : Willy upchucked his whole dinner.
n. vomit. : Is that upchuck on your shoe?
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
upchuck
"to vomit," 1960, Amer.Eng. slang, from up + chuck (v.) "to throw."