Doctor Christopher Duncan Turk, who's mostly known as just Turk, is played by Donald Faison and is J.D.'s best friend on Scrubs.  He is a surgeon at Sacred Heart and quickly dates and marries one of the nurses there, Carla Espinosa.  He and Carla then have a baby Isabella together.

Turk loves to dance and is definitely one of the best surgeons and makes it well known.  His man love with J.D. is one of the best parts of the show.

Turk Quotes

Turk: Let's think about some of the great girls you let slip through your fingers. Kylie, Jamie, Gift Shop Girl, Mini McSkinny, Mole Butt, Tina Two-Kids, Rumple Fugly...I'm forgetting someone...
Carla's narration: Oh my god Turk, if you forget Elliot she's going to cry.
Carla: Turk, aren't you forgetting the greatest girl of them all? (Discretely gesturing at a dejected Elliot)
Turk: (Snaps) Heidi Horseface!
Elliot: Me! Turk, she is talking about me, ok!?
J.D.: Relax, Elliot, you're Mole Butt.
Elliot: Really? (Becomes happy) Sorry Turk.

Turk: Baby.
Carla: Hmm?
Turk: I would never sleep with your sister. She's hideous.

Scrubs Quotes

Janitor: Aww, either your picture didn't come out, or we got a hospital full of vampire doctors.
J.D.'s Narration: Vampire doctors? How did he hear about my screenplay?

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Girl: Mommy? When's daddy coming home?
Mother: He isn't. If only he'd loved us enough to get a full body scan at Sacred Heart!