when your ass turn red from chafing and you start walking funny. (not fun)

(n) Game played by elementary school children. A tennis ball is thrown against a brick wall.
Anyone is free to catch it. If the person attempting to catch the ball bobbles it, they must run to touch
the wall before being pelted with the ball by another player.
If they are unsuccessful in reaching the wall, the player must stand, facing the wall, whilst each of the other
contestants throws the ball at his rear end.

In Texas: one who is beyond being a bad ass, one who will do whatever it takes to get the job done and will shoot first and ask questions later.

Someone who attends Texas A&M and is very involved and follows all traditions.

as a noun, red ass refers to a person that has a bad temper, as an adjective, red ass describes an angry person (man, that guy has the red ass) and has levels depending on how angry the person is (red ass, red hot ass, red hot chili pepper ass).

Being really pissed off.

Synonym for upset, taken from "that chaps my hide"

In sports usage: A player that is always pissed off. Usually said off an outstanding player when anything short of perfection isn't good enough. If Randy Johnson gets a win, he should have struck out 15, or have thrown a shut-out, or a no hitter. Basically a red ass is never pleased with his or his teammates performance on most occasions.