A phrase you say when:
1) People suggest for you to do something
completely retarded.
2) You don't really believe what someone has said.
3) Someone says something stupid that makes no sense.
4) Someone is making fun of you.
Also can be used frequently with
cool thing. The phrase becomes really effective if you use hand motions to interpret it. The most common one is moving your hand in a roller
coaster fashion: Move it slowly up like you are climbing the first hill on a coaster for the first two words, and draw them out saying them in a high pitched voice....Yeah Maaaaaaaaaaannnn....Then for the next word, still in a high pitched voice, act like you are at the top of the hill and stop for a second....Yooouuuu(Pause) ....Then
plummet down the hill with the last word saying it real fast and in a deep voice....Right....And thus you have the hand motions.
Example:
Friend: "Why don't you go play in the street?"
You: "Yeah Man You Right!"
Friend: "My uncle is the King of an African country, and he has twenty pet
lions."
You: "Yeah Man You Right!"
Friend: "
Your face is so ugly, it looks like
you fell off the ugly tree and hit every branch on the way down."
You: "Yeah Man You Right!"