
Let me just go inside
and slip off my UNDERWEAR.
The Big Bang Theory Season 2, Episode 20

Like all my UNDERWEAR, that notebook says,
"Property of Sheldon Cooper."
The Big Bang Theory Season 10, Episode 19

Speaking of UNDERWEAR,
I have some interesting news.
The Big Bang Theory Season 8, Episode 7

A second what? Pair of UNDERWEAR?
The Big Bang Theory Season 1, Episode 17

It's a good thing I'm not wearing flag UNDERWEAR
right now because there's about to be a fire.
The Big Bang Theory Season 8, Episode 3