Characters from the television series and film "Avatar: The Last Airbender" draw on the four classical elements common to many ancient philosophies for bending arts: Water, Earth, Fire and Air.
We augment this list to include the element of 'retard', here abbreviated 'tard'. Retardation is an element common to all nations, and benders of this element are incredibly common. A tard-bender is thus someone exceptionally skilled at taking their retardation to the next level in a truly gifted and public manner.
Someone demonstrates their tard-nation bending when they attempt to perform drunken urban pole dancing on a no-parking sign in the middle of a Sunday afternoon on busy street. See also "no talentass clown."
Also known as a food stamp card. One might be issued one of these by the government if they're too retarded and/or lazy to work for sustenance or if they're a mooching leach bilking the system and lying about aspects of their lives so that they pocket the cash when selling discounted groceries to others using said tard card.
Jenny: I'm too fucking stupid and lazy to work but whoring around and squirting out maggot children is so much fun.
Steve: Go to the welfare office and get a tard card so you can at least feed your maggot spawn and your fat stupid lazy ass.