When you burp and some liquid from the stomach ends up in your mouth. Term can be used as a noun or verb.
Noun: Pukeup- liquid from the stomach that comes up into the mouth when you burp.
Verb: Pukeup- to partially vomit but only as far as in your own mouth.
Jamie(after taking a big drink of Coca Cola and then burping): "Ewe."
Ben: "What happened, did you puke-up?"
Jamie(swallowing her puke-up): "Yes."
Ben: "Ewe...nice one butt-pipe!"
by Joe Bough October 08, 2006

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