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3.
Refers to the theoretical act of reaching into a woman vagina with your hand, clamping her cervix, and pulling the vagina inside out causing what looks similar to a balloon.
Did you hear that one chick who got a meat balloon? Yeah, she never got it all to go back in.
by Malachi Ruffalo October 28, 2006
 
1.
The expandable dangler, the penis, in its turgid form.
There are many ways to properly inflate a meat balloon, but a high pressure helium tank is not one of them.
by bobaphat February 15, 2006
 
2.
Large fatty breasts, normally refering to female anatomy but interchangable with male obesity.
I think her boyfriend's meatballons are bigger than her own.
by meat balloons mcgruff January 13, 2004