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2.
to vomit into someone's gaping vagina or anus
Jacob likes to downchuck into Michael. Michael loves it.
by jakebeefcake November 04, 2010
 
1.
The kind of opposite of upchucking. When you vomit a bit, and you accidentally swallow it. Leaves nasty taste in your mouth, and it can often happen many times if you are hungover.
Guy 1: "Damn it, after that massive party I fucking downchucked like 8 times"
Guy 2: "That's nasty"
by AnnoyedBlackGuy July 22, 2006