Harness Jack 

To jack off while parachuting.

Bob: Hey dude, lets harness jack!
Jim: Alright!!

Harness Jack by Moskau September 23, 2005

Captain Jack Harkness 

A character in the popular BBC series of Doctor Who and the spin off Torchwood. Played by John Barrowman, MBE. Captain Jack first appeared in the episode " The Empty Child" . Unfortunately Jack dies in his travels with the Doctor but is reserected by Rose when she absorbs the time vortex , it is later discovered that he is immortal. In the Future Jack is knowen as the face of Boe. Jack is the first non-heterosexual character in Doctor Who. A flirt Jack has often been referred to as a "walking innuendo".

Jack: Captain Jack Harkness. And who are you?
Martha: Martha Jones.
Jack: Nice to meet you Martha Jones.
The Doctor: Oh don't start!
Jack: I was only saying hello.
Martha: I don't mind.
Jack: Doctor.
The Doctor: Captain.
Jack: Good to see you.
The Doctor: And you. Same as ever. Although. Have you had work done?
Jack: You can talk.

Captain Jack Harkness by TheNerp December 20, 2014

Jack Harkness 

Canon Doctor Who/Torchwood Character. Omnisexual(According to John Barrowman),Iantoloving,Immortal, Ex-Time Agent from the Boeshane Peninsula in the 51st century. Companion of the 9th Doctor and temporary companion of the 10th. Actor is John Barrowman. Extremely flirty and extremely fabulous.

"Captain Jack Harkness, and you are?" Jack was trying to flirt. "Oi! Stop it!" There was a noise in the background.

Jack Harkness by Sharkcat12 January 6, 2016

Captain Jack Harkness 

A character from Torchwood and some episodes of Doctor who. He is played by John Barrowman. He often fights Aliens from outer space. He has the inability to die, yet still ages. Some theories suggest that he is the younger version of The Face Of Boe.

Captain Jack Harkness can kick Captain Jack Sparrows ass!

Captain Jack Harkness by Angel Of Darkness April 5, 2008

Captain Jack Harkness 

Someone so sexy, his own name is a pickup line.

*Walks into a bar and sits next to random woman*
Hey, Captain Jack Harkness
*Everybody in the bar has sex with him*

Captain Jack Harkness by LiftedStarfish March 4, 2017

Captian Jack Harkness 

1: Noun, a companion and helper of The Doctor on the Brittish television show Doctor Who. An omnisexual conman who runs the secret organization Torchwood. After becoming a fixed point in time, he ages very slowly, and eventualy becomes the (SPOILER) Face Of Boe.
2: adj. Someone who is very sexualy active, or makes lots of inapropreate passes, jokes or enjoys such. A boundless flirt.
3: Captian of the Inuendo Squad.

Gwen: Have you ever eaten Alien meat before?

Captian Jack Harkness: Yeah, once.

Gwen: What was it like?

Jack: Well, he enjoyed it!

Captian Jack Harkness by CuriousKuro October 2, 2011