A store where you can buy a shot gun, ammunition, a ski mask, a baseball bat, a meat cleaver and a chainsaw, but you can't buy a CD that has a "Parental Advisory" sticker.
Playing any online game with a poor internet connection. The connection is so bad that it is as if he/she is playing on the demonstration XBox, PS3, etc. at Walmart. Walmart connections are not always constant and can happen at any given time.
Me and my buddies were about to complete the last vidmaster challenge on Halo when John's Walmart Connectionkicked in and he lagged out.