Knock, KNOCK.
Breaking Bad Season 3, Episode 12
Oh, don't be. You get your hopes up,
I KNOCK them down,
The Big Bang Theory Season 10, Episode 6
Knock yourself out.
Breaking Bad Season 3, Episode 10
This is the secret KNOCK:
The Big Bang Theory Season 1, Episode 16
BERNADETTE:
Knock, KNOCK.
The Big Bang Theory Season 4, Episode 9