1- pharmaceutical uppers, stimulants, or steroids
2- Easy method of measuring and transporting street drugs in pill form.
1- I was dragging ass today at work, so I popped a couple of stackers and now I'm a hummingbird
2- I got some stackers of X mixed with coke... where'd I leave that fucking razor?
That annoying arcade game you see at Wal-Mart. You must stack bricks on top of one another by hitting the button at the exact milisecond. You can win a crappy dollar store consolation prize, or go for the bigger prizes. Makes an annoying "woo-ooh" sound when you hit the button right.
Crap! I just spent $10 at stackers and all I got was a lousy hippo keychain.