The phrase was created from a hiphop/rap group DL2.
To throw a stack of money in the air like a shuriken. A stack is piled up on one hand and the other hand rubs off the money on the top of the stack until its all gone. The act of spraying money looks as if the money is being sprayed out of the hand.
Spraying money can be done by big time ballers and ballers. Big time ballers often use 100's and 20's where as ballers use singles.
Hold that stack spray that money in the air. - DL2
The ultimate tweeker. It takes many a night of hiding in your closet under a blanket with a roll of furl (aluminum foil) extra heavy duty if you got it, a straw or two, a handfull of lighters and as much sprack (tweek, go-fast, meth, "the shit that killed Elvis" if you know the right folks) as you can get to reach this ultimate level of tweekerism raised to the sprack degree.
Dave has been held up in his room all night sprack-attacking. Yeah, he is just a certified sprack monkey.