The Big Bang Theory Season 4, Episode 18

I mean, I can hear the toilet flush in your apartment.

The Big Bang Theory Season 4, Episode 23

At least go with me so you can open the door and flush the urinal.

The Big Bang Theory Season 6, Episode 24

Well, flush Sheldon down the toilet and get me a new one.

Breaking Bad Season 5, Episode 13

but I know how to flush him out.

The Big Bang Theory Season 4, Episode 1

How would you flush it? And when you did flush it...