when an intense shit attack overwhelms you to the point where you'll shit in the river and wipe your ass with a rock.
after eating two dozen hot wings and jalapeno poppers, I had ass contractions like there was fire in my ass.
by zimdaddy August 16, 2003
When someone has severe gas or shit pains thay they feel like they are in labor.
Oh man, I can barely walk to the bathroom! These ass contractions are killing me!
by Cazador301 May 22, 2015