halar bhai

Bengali slang literally meaning Brother-in-law's brother. Used to refer to someone being a jerk or annoying people

Subject F: I wish people would stop being so happy all the time
Rahin: That's such a halar bhai thing to say

Sabage

A japanese term for airsoft, and an acronym for Survival Game. It probably originates from the manga under the same name.

Friend 1: Wanna play Sabage?
Friend 2: The hell is that?