Urban Dictionary: muddy jack hammer

Top definition

when a woman puts a vibrator in her ass while being boned

I was having realations with this chick and she used a muddy jack hammer.

Jul 29 Word of the Day

Someone who used to be a potential girlfriend/boyfriend, but no longer is.

Tim: Zack, is that your exgirlfriend?
Zack: No, she's an expotential. We never actually dated...

by brownsuite September 24, 2011