TV series example of the word

The Big Bang Theory Season 4, Episode 3
I got those weightlifting gloves and that five-pound dumbbell.

The Big Bang Theory Season 12, Episode 15
but her dumbbell ex-boyfriend does.
(1) An exercising weight; two spheres connected by a short bar that serves as a handle
(2) An ignorant or foolish person
(1) A dumbbell molecule
dope
dummy
booby
pinhead
boob
brain
genius
The Big Bang Theory Season 4, Episode 3
I got those weightlifting gloves and that five-pound dumbbell.
The Big Bang Theory Season 12, Episode 15
but her dumbbell ex-boyfriend does.