You mock the sphincter,
but the sphincter is a class of MUSCLE...
The Big Bang Theory Season 4, Episode 2
Good thinking, I'll just be the MUSCLE.
The Big Bang Theory Season 1, Episode 1
Don't move. Don't--
Don't dare move a MUSCLE.
Breaking Bad Season 5, Episode 16
We need MUSCLE
and we need enforcers.
Breaking Bad Season 2, Episode 11
That leaves you, by default,
as the MUSCLE.
The Big Bang Theory Season 3, Episode 17