The larger, 16 oz. cans of beer. Usually of the domestic variety, you know someone is serious when they walk out of the liquor store with a bag full of pounders.
Ya dude I got a six of Bud pounders for the ride down.
A synonym for a women's breasts, usually when they are huge and said women isn't wearing a bra.
Holy shit, look at Becky's pounders! There's no way she's wearing a bra.