To laugh very hard usually while under the influence of marijuana and/or alcohol. quag
When we get there try not to quag out ok.

Dude, will u stop quagin out...shit wasnt even that funny
by bigtimeOT November 29, 2007
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The act of checking out a girl (or guy) and having a sudden vocal reaction (a la Quagmire from Family Guy). Typically the vocal response is something along the lines of, " Oh my god!" or "Holy Sh*&", and may be followed by such creepy actions as stalking or taking a photograph without the consent of the "quagee".
Friend 1: Dude! That girl is wearing nothing but lingerie (bites index finger).
Friend 2: Careful, you're about to quag out all over the floor.
by chicosucio96 August 10, 2011
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