1 definition by Manly McMan

Top Definition
The opposite of a sausage fest or testical festival. A party consisting of 90% or more females. A woman's vagina looks like a roast beef sandwich, hence a large gathering of vagina = the largest Arby's roast beef sandwich the BIG MONTANA.
Dude, you have got to get over to this party its a fucking big montana right now!
by Manly McMan May 10, 2006

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