Ouh is usually used when you see, hear, smell, taste, or feel something you like it's the sound you make when you're enjoying something. Ouh can also be used as a replacement for, "yikes".
She smelt her mother baking pie and said "ouh"
The email wasn't sent on time ouh oh..
The reaction sound a person may make when the person they're talking to says something crazy, funny as hell, and sinister, but fell like you can't fully laugh
"I banged your mom with your dad watching. He joined in, as well as the dog." Jason says.
OUH is an onomatopoeia which it's played when you die in Roblox (More known as "OOF")Z.
This word is used when someone tell you something violent or when you hear someone say something violent.
Raphael : Hey Mickael, you're a son of a bitch and you don't deserve to live !
Mickael : OUH