Someone who is stupid, and who doesn't think before they act/speak. Spoonerism of "mentally retarded," and has come to mean someone who isn't retarded, but acts like it.
Dang, that kid just forgot his shoes. He's rentally metarded.
One coming from a school of Millard Middle School, with bad food, dirty EVERYTHING, trailers for classrooms, crappy teachers, and basically no education. But they are really funny and have good personalities.
A gansta term deriving from Australia, a compliment used to describe how thuggin someone is. Originally millard, the phrase has been changed by todays kids.
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.