Originated in a small town of Georgia by this blasian chick who threw the fucking craziest party ever.
Common use for it is writing down SHP at the bottom left of a flyer.
Programmer 2: I'm gonna work on my SHP!
Programmer 1: Cool, what are you making?
Programmer 2: Can't tell, it's secret! But it's gonna make me rich so I can quit my job! Ha ha ha!
Programmer 1: Whatever