1. n. A condition noted by behaving in such a puerile, obnoxious, and moronic manner as to have one's head up his or her ass. Note that things are dark and smelly for someone with this condition.
2. When someone is severely afflicted to the point that his or her shoulders are two-blocked against the buttocks, this is known as "perpendicular cranial rectitis."
Why do all those Hollywood idiots have such cranial rectitis?
Boy, Harry Reid debates with all the intellectual acumen of SpongeBob SquarePants. How did he contract perpendicular cranial rectitis?