A Redneck Swimming Pool is a pool of water in the bed of a pickup truck used by rednecks to bathe in.
Toothless Joe didn't have enough money to get his own private pool so instead he filled his pickup truck with water and used it as his own private pool. In other words, he made his own Redneck Swimming Pool.
Pulling out the bottom of your t-shirt to create a 'pouch' for holding ice dispensed from a machine. Utilized when a bucket or other receptacle is not abailable.
Don couldn't find an ice bucket in the hotel room, so he utilized his redneck ice bucket to bring some back to the room.