Simple Jack 

1:

To not pull off a retarded impersonation.

2:

To look retarded trying to 'look retarded'

Dude 1: Hey, did you see that guy's retarded impersonation? I totally was not impressed.....

Dude 2: Yeah.. he was going full retard..

Dude 1: ......Simple Jack status...

Simple Jack by D_4_Less August 18, 2009

Simple Jack 

Used as an adverb for stupidity. Taken from tropic thunders "full retard" scene

That girl was just dumb, she was simple Jack dumb.

Simple Jack by I don't care any more April 10, 2017

Simple Jack'd

To be ridiculously stupid and genius all at the same time.

-Doing homework ahead of time for one class, then turning it in to another, you just Simple Jack'd yourself
-Trying to scare someone back, when the person you scare is yourself, you just got Simple Jack'd.
-It can be applied to almost anything.

Simple Jack'd by Bumpy23 January 2, 2012