Professor Woo.
The Big Bang Theory Season 6, Episode 20
Kripke, Professor Woo, Professor Klein,
The Big Bang Theory Season 10, Episode 16
Oh, not you, Dr. Woo.
You're fine.
The Big Bang Theory Season 7, Episode 6
the pitching of WOO.
The Big Bang Theory Season 11, Episode 11
...that neither of you
would attempt to WOO her.
The Big Bang Theory Season 4, Episode 6