Not Cool Bro!! 

The phrase of choice of a very loud Armenian male population, especially from Glendale, CA when they disapprove of anything not to thier satisfaction. Normally said in a very loud, booming voice with a rolling 'rrr'. This phrase is used mostly in driving situations where the all too perfect Armenian driving style has been disrupted in some way.

Shouting from his driver' side window - "Hey BRO! Not Cool Bro! Why you make lane change my lane when you KNOW I coming BRO!?? NOT COOL BRO!!".

Not Cool Bro!! by Glendale, California November 9, 2011

Notcoolbro 

He's a kid who thinks he's cool he's not he's a twiggy little little crumb with no upper body strength and he's all talk basically a emo with a big mouth

Notcoolbro not cool

Notcoolbro by Rocky_glowz August 31, 2022