Top definition
The muscle in a woman's tummy that contracts during an O.
Dude: Is that a six pack?
Chick: No, it's a highly toned O Muscle.
by B.B. Smith September 02, 2008
Get a O Muscle mug for your dog Jovana.
Jul 26 Word of the Day
Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed
I got a call from X the other night. She had an extra ticket to a concert she bought for a friend, but they couldn’t make it so she called me to ask if I wanted to go because I am her Second String Friend.
by Deus-ex-machina August 26, 2020
Get a Second String Friend mug for your sister Yasemin.
2
The muscle in a woman's tummy that contracts during an O.
Dude: Hey, you have a six pack.
Chick: No I don't, just a highly toned O muscle.
Dude: Well, let's pour some honey on it. . .
by B.B. Smith August 15, 2008
Get a O Muscle mug for your girlfriend Helena.
3
The muscle in a woman's tummy that contracts during an O.
My law partner has a remarkable O Muscle.
by B.B. Smith September 05, 2008
Get a O Muscle mug for your cat Paul.
4
The muscle in a woman's tummy that contracts during an O.
Mr. Smith: You have a six pack.
Miss Smith: No, it's just a highly toned O Muscle.
by B.B. Smith October 09, 2008
Get the O Muscle neck gaiter and mug.