When you hold down the shift key to use "!" (or any other thing you need the shif to use)multiple times and you "slip" on the last one.
Mark: Are you okay man?
Kyle: HELLZ YEAH I AM!!!1
Mark: Shift slip?
Kyle: yeah...
by flipflopsandsocks March 11, 2008
Get the shift slip mug.
When you try to press the ! key on your computer a billion times, and it looks something like this: !!!!!!1111
Oh Man!!!!!11 i just sent message on facebook and accidentally shift-slipped, they're all goin' to think I'm a noob!!!!!111
by S_BIRKO September 4, 2009
Get the Shift-Slip mug.