
Hey, you're in a good MOOD.
The Big Bang Theory Season 7, Episode 10

Wait. Stay in the MOOD.
The Big Bang Theory Season 12, Episode 3

Sheldon, is it possible
that your foul MOOD--
The Big Bang Theory Season 5, Episode 6

And there goes the MOOD.
The Big Bang Theory Season 8, Episode 18

You're right. You did kind of kill the MOOD.
The Big Bang Theory Season 8, Episode 24