Gungnam

A synonym for the word mandem, but meant for people who have a higher societal stature. It can also be used as a positive remark to describe something and acknowledge how good it is.

James: Morning chaps, what do we think about this fine art installment.
Wigbert: Oh yes positively Gungnam my good sir.
Sebastian: Indeed - Gungnam

Or

Trent: What’s appening lads !?
Brent: Just getting a picture wiv the mans.
Trent: Gungnam ting