Boulder Butt 

A woman with an ass that looks like to big boulders, cause of all the demples

Man that woman got a Boulder Butt

Boulder Butt by LoveBunny1 January 13, 2014

Butt Boulder

1. An enormous, dense, tightly packed mass of poop capable of achieving mass destruction by means of toppling trees, buildings, and the American dream.

2. Big/big round poop.

1. Today at work I sit down, then I dropped a butt boulder in the trash can.

2. This is a heavy butt boulder, daddy, what did you eat?

3. Would someone please tell me what "butt boulder" means?

4. Do me in the butt, then eat my butt boulder.

Butt Boulder by AdamWW July 24, 2008

Butthole Boulder 

1) A hard, rocky turd, usually spherical but can be patty-shaped. Just one, no more no less, in the bowl, as if it cracked off a canyon wall.

2) Any kind of stone shaped shit that may or may not tear one's anus on the way out.

3) What almost squished Indiana Jones in his first movie before he deftly dodged it to safety.

4) What can sometimes dangerously develop in one's lowers after eating two whole, nutritious loaves of white Wonderbread simultaneously without drinking a glass of water.

Dude, that butthole boulder you just launched rolled like a stone down the bowl like some underwater pinball machine. See if you can fish it out. We need a new doorstop.

Butthole Boulder by Wyatt Junker July 10, 2011