
Which was DUMB.
The Big Bang Theory Season 10, Episode 22

Not as DUMB as
unleashing a plague on mankind,
The Big Bang Theory Season 12, Episode 14

Set phasers to DUMB, right?
(chuckles)
The Big Bang Theory Season 5, Episode 20

Are we still doing the DUMB thing?
Okay. Why, what's wrong?
The Big Bang Theory Season 10, Episode 1

Don't play DUMB with me, sister.
You tell your husband he owes me $200.
The Big Bang Theory Season 6, Episode 9