
But you using Sheldon
to do your DIRTY work,
The Big Bang Theory Season 9, Episode 21

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

It's DIRTY laundry. You're up.
What? You...
The Big Bang Theory Season 7, Episode 3

An old, DIRTY liar.
The Big Bang Theory Season 12, Episode 12

You're a-a DIRTY...
The Big Bang Theory Season 5, Episode 2