Jack North 

To masturbate in an upward motion.

I went and jacked north the other night.
(Can also be used as a noun)
I visited Jack North if you know what i mean YKNOWWHADDIMSAYIN?

Jack North by daniel bryant November 5, 2005

jackworthy 

A female (usually young and skinny with well proportioned breasts) whose picture or image you would want to jack off to.

Mallory Wood gives me wood-she is so jackworthy.

jackworthy by jordan skelly May 13, 2005