look up any word, like twoosh:
 
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
 
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