its refferring to the fact the person just took extacy.. stacks as in the excaty pill and on deck as in ur body.
by madman. September 03, 2008
Is when you shove your penis in a deck of cards and ask your sexual partner, "Pick a card any card." He/She will be tempted to pick your dick and then suck it.
by GaryOak2320 October 11, 2013
Dude weren't you supposed to go help out with the tap performance last week ...no I got stacks on deck cause I asked my cousin to do it instead cause he's got a degree in this stuff
by Faithmoriahfaith July 05, 2018