in. to empty one's stomach; to vomit. (Teens and collegiate. See also cry ruth.) : She went home and ralphed for an hour.
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
Ralph
masc. proper name, shortened from Radulf, from O.N. Raðulfr (O.E. Rædwulf), lit. "wolf-counsel," from rað "counsel" + ulfr "wolf."