Something that is so bad that two wordsindicating how bad it is have to be combined together.
An item, person, or event that fails so hard that calling it retarded would be a complement.
Last night's party was fucking failtarded. There was one girl, she was fat, and some dude grabbed my butt. Not to mention someone ran off with a bottle of Goose.
1. The state of being a flattard.
2. An insult to one's intelligence.
The word flattarded originates from the derogatory name for people who believe the Earth is flat, or "flattards". Flattarded is used as an alternative to the popular insult "retarded" and is generally considered to be more derogatory in nature.
John: "I can't believe you think the Earth is a globe it's obviously flat!"
Bill: "Fucks sake John I didn't know you were this flattarded."