1. Byproduct of male masturbation
How the fuck did I get jacksauce in my hair?!
by berserker256 May 16, 2003
Buttermilk sauce from Jack In The Box, jokingly refered to as Jack's seminal fluid.
"You got any extra Jack Sauce?"
by PseudoIntellectual December 28, 2003
The orange sauce that they don't have anywhere else on the planet. I believe it is Thousand Island mixed with French Dressing.
May I have a Jumbo Jack with extra Jack sauce?
by Seraph April 18, 2005