O Muscle

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 2, 2008

O Muscle

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

O Muscle

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 5, 2008

O Muscle

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 9, 2008