
...to pop an emotional CAP
in his buttocks.
The Big Bang Theory Season 2, Episode 9

Yeah, I'm sweating
my bald CAP off.
The Big Bang Theory Season 12, Episode 24

and then to CAP off
the perfect day,
The Big Bang Theory Season 7, Episode 2

Where a baseball CAP backwards
to prove your point?
The Big Bang Theory Season 11, Episode 15

Cap and gown?
Why do I need a CAP and gown?
The Big Bang Theory Season 8, Episode 22