
Sucker.
The Big Bang Theory Season 5, Episode 5

Choke on that, SUCKER.
The Big Bang Theory Season 3, Episode 5

STUART:
That's right, SUCKER!
The Big Bang Theory Season 8, Episode 1

That SUCKER is well named.
The Big Bang Theory Season 7, Episode 6

You're kind of a SUCKER.
The Big Bang Theory Season 10, Episode 1