(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.
You got A in that test? Mad Oh!

This movie is gonna be Mad Oh!

Boy: I think I'm in love with you
Girl: Mad Oh!
by Kadet † December 27, 2019
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Coined by George Fakunle, it expresses amusement or excitement often caused by a mind blowing event or occurrence.
Bro I’m about to link that girl

Bro : ahn mad oh
by Michigan bulldog December 27, 2019
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Mad oh! is local man's way of expressing "Oh, Damn!" It is used to express pleasant surprise and amusement.
So her puffed up chest is 95 per cent bra work??? Mad oh!
by YouCrane January 22, 2020
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A phrase coined by Nigerians used to express disbelief, suprise, shock.
Guy you hear the news? Mad oh .

That guy just die like that?! Mad oh
by aba.yaa_ July 22, 2020
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