Sucker.
The Big Bang Theory Season 5, Episode 5
With pay, SUCKER!
The Big Bang Theory Season 10, Episode 12
You're kind of a SUCKER.
The Big Bang Theory Season 10, Episode 1
That SUCKER is well named.
The Big Bang Theory Season 7, Episode 6
STUART:
That's right, SUCKER!
The Big Bang Theory Season 8, Episode 1