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1.
The thick smoke slowly exhaled after taking an incredibly large drag/rip from a cigarette, blunt, or other smokeable. It is an acronym for Vomiting Out Milk In Space because that is what it looks like.
I got the biggest rip dude! Did you see that VOMIS?
by A420 January 09, 2009
 
2.
Action de restituer son repas pour amuser ses amis.
"As-tu fait un ptit vomi?"

"Uh oh, j'pense que Mario va faire un tit vomi sur le tapis"
by ElectroBOY November 04, 2003