Slut Muscle

A. A good-natured nickname or banter between Heterosexual bros.

B. Someone characterized by being a slutty un-thinking sex fiend with low standards, similar to someone who thinks with their dick (basically any straight male).

A: What's up you dirty Slut Muscle.

B: My friend Ben is a major slut muscle...he wants to bang all the bitches, regardless of what they look like. He's a regular bro.

by Fat Box June 18, 2012

Muscle cup

A pussy

She had one tight muscle cup!

by Sir Black Lavender IV February 8, 2010

twat muscle

bitch, pussy, asshole,etc, anything you would call someone if you were mad, or frustrated with them

"Damn it Coolie you twat muscle, give me my shorts back!"

by Casey Hurn May 24, 2006

Rejection muscle

A married mans nickname for his wifes vagina.

Harry "I tried to score a root from the wife last night but I lucked out"

Joe "What happened"

Harry "She flexed her rejection muscle at me"

by Bigpeteoz December 14, 2009

Muscle Rub

A rough and vigorous hand job.

Sonja gave Frank a Muscle Rub to completion. The harder the tug the more he unloads.

by Eaton Holgoode May 2, 2015

muscle butt

A girl who has a ass that is so muscular that if she wasn't muscular it would be straight flat

Damn maddys ass is so muscular she got a muscle butt

by David Yeum May 16, 2016

smart muscle

The butthole muscle that determines if a fart will contain solid matter and thus retains the fart for later release on the toilet.

I think my smart muscle is broke because I just sharted in my skivvies.

by masedog February 3, 2008