
Professor Woo.
The Big Bang Theory Season 6, Episode 20

Your inability
to successfully WOO Penny...
The Big Bang Theory Season 1, Episode 14

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

Oh, not you, Dr. Woo.
You're fine.
The Big Bang Theory Season 7, Episode 6