OI NAH 

something uncool or not good.

When the word no just doesn’t seem expressive enough.

Meaning utter disagreeance with the situation at hand.

“So I was driving down the road and suddenly a deer wanders in front of my car and I’m like ‘OI NAH’ and hit the breaks to avoid hitting it.”

OI NAH by Shananniegans August 28, 2018

Nah Oi 

Affirming ones statement, but gaining the attention of the other person in the conversation to continue ones point.

Lets go to the pub, but "Nah Oi" not that one.

Nah Oi by Hugo Vag October 25, 2010

Oi yeah nah yeah 

Oi yeah nah yeah

No one:

Australian: oi yeah nah yeah yeah

Oi yeah nah yeah by Cunt42 November 18, 2019