
And then, maybe after,
we can watch a DIRTY movie,
The Big Bang Theory Season 9, Episode 11

Wow. Talk DIRTY to me.
The Big Bang Theory Season 6, Episode 23

Dirty, DIRTY, DIRTY.
The Big Bang Theory Season 4, Episode 21

WOLOWITZ: Halley, leave your
brother's DIRTY diaper alone.
The Big Bang Theory Season 12, Episode 7

Almost as DIRTY as the DIRTY
girl who's wearing them.
The Big Bang Theory Season 7, Episode 11