(Originating from the streets of Lagos, Nigeria) An expression of surprise, shock or astonishment often caused by something unexpected or mind blowing. It can be used as an adjective in some cases.
Mad oh is very dynamic hence, it is also a valid /sarcastic reply to any statement whatsoever. In cases where you are tired of a conversation, mad oh will do a lot of good because of its conversation terminating abilities.
"Oh you madcuz I'm stylin on you!
you got better gear you couldn't style it on me
plus the cal is on me
so act up
and you gon have to fuckin lay down!..." *WHACK*
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.