Jack Stack 

A collection of pornographic magazines, typically located in the bathroom or bedroom that is used to visually aid the jacking off or masturbation process. This collection of magazines usually includes periodicals such as; Jugs, Beaver, Ass Jacks, Hustler, etc.

Wayne: Dude, you see the Jack Stack in Bruce's bathroom? Wow, impressive!

Frank: Yeah man, that was killer! I had to open them up and rub one off when I was at his house last week!

Jack Stack by Techsan93 December 9, 2008

jack the stack 

shortened version of jackin the smokestack, meaning to jerk off or masturbate.

only used by men of course.

james: wtf are you doing?
me: chillin at home, about to jack the stack.
james: haha, n1.

jack the stack by rayjay April 23, 2006

Stack and Jack 

This is when no less than 9 homeless guys pile into the back seat of your car (generally a Prius) then lay down on top of each other stacking one by one then jack each other off.

Hey Lou! That there fuck party we had behind the dumpster last week damn near broke my dick off! Maybe tonight when everyone gets here we can just jump in this Prius and do an old fashioned Stack and Jack...So we can have a night off and I can ice my dick...

Stack and Jack by Larry and Rex and Benny July 31, 2018

stack n jack 

One man lays on another man both facing up, the man on top reaches between his legs and jerk the bottom guy off.

Dustin and Logan stack n jack every Tuesday night.

stack n jack by thatsickdude December 13, 2014

Jack Sack 

A type of manbag, but far more cool! Used by Jack Bauer of 24 to carry his awesome and unlimited arsenal of weapons to take on the terrorists that threaten the US

Jack: Dude, that manbag is so lame, you need to get yourself a Jack Sack

Tony: Copy that

Jack Sack by Paulstudy March 27, 2010

Jack jack sack attack 

Jack jack sack attack

Jack jack sack attack
Jack jack sack attack

Jack jack sack attack

Jack jack sack attack

Angus:Hey Athur guess what

Athur:what
Angus:jack jack sack attack

Athur: shut up bean

Jack jack sack attack by Angishangi January 14, 2020

Jumping Jack Sack 

While having sex the guy does jumping jacks while still inside. Very hard to do a lot of training but well worth it.

Matt was so amazing when he Jumping Jack Sacked me last night

Jumping Jack Sack by Hairy Flounder March 14, 2009