The muscle that holds your asshole shut. To call a person a sphincter muscle is very offensive. Your basically calling someone a asshole.
Man check out that woman over there yelling at those kids for fishing near her precious boat. She is a sphincter muscle and needs to stop talking shit.
by jimmybomm October 19, 2020
"That cricket ball hit me square on my Mister Muscle! Good thing I was wearing the old jelly mould!"
by Bugzapper February 24, 2014
by Da Prof March 23, 2005
An undersized running back who is hard to tackle due to his lack of height, low center of gravity, stocky build and extremely thick lower body.
1) Damn! Maurice Jones-Drew just ripped my fantasy team defense for 174 yards and two touchdowns! That dude is a muscle-ball, you just can't tackle him!
2) That runningback is a damn muscle ball! We couldn't tackle him in a phone booth!
muscle jones-drew football
2) That runningback is a damn muscle ball! We couldn't tackle him in a phone booth!
muscle jones-drew football
by Coach Thomas October 24, 2011
by rainebohbrite October 14, 2011
by rachel brown January 04, 2004
the muscle in between a womans legs...also an insult to call someone who is not acting in accordance to what you want them to fucking do
i was lickin on this bitches cunt muscle...she was being such a cunt muscle because she wouldnt suck my dick after i put it in her ass!
by kushstunter69000 April 22, 2009