And a complete SUCKER.
The Big Bang Theory Season 6, Episode 21
Sucker.
The Big Bang Theory Season 5, Episode 5
Choke on that, SUCKER.
The Big Bang Theory Season 3, Episode 5
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