Wacker Jacks 

The nickname given to any member of a sports team who neglects to wear fitting boxers or compression shorts and proceeds to participaate in jumping jacks. Their neglecence results in a the very noticable flopping motion of their package as they continue jumping.

You: yo man aint u trippin about forgetting ur compression shorts for practice

Friend: na its aight dude I'll just wear these loose boxers
You: But we doin jumpin jacks right now, dude ur dick is floppin everywhere. Ur a wacker jacks forreal

Wacker Jacks by Weapon Xman G forreal November 19, 2010

jack walker 

A nickname for the libation Johnnie Walker, as in Jack is a nickname for someone named John.

Pour me another double of Jack Walker if you would my dear serving winch.

jack walker by biffula December 27, 2007

Jack walker 

A massive crackhead, likes the sound of his own voice and usually rather small

That boy there is a jack walker

Jack walker by Jackwalker123 March 5, 2020

Jack Walker 

A fat tax dodger, now a corpse.

Mong faced shite-hawk.

Jack Walker by Tom Finney's wrinkley ball-bag April 2, 2003