gang mentality 

When you are an original gangster (OG) and you get together to gang up on an outsider together with the sole purpose of defending the gang no matter what.

Anna and Tracey are showing their gang mentality telling Brant he is not an OG.

gang mentality by OriginalG January 30, 2016

Mentality Gang

(adjective) What your band teacher uses to describe you after they compare themselves to the victims of the Parkland Shooting because she feels threatened that people don’t like her.

“You guys have Mentality Gang and shouldn’t come on the Hawaii trip!”

Mentality Gang by Jonny213 May 28, 2018