What is Brbg2gp?
A combination of brb (be right back), g2g (got to go), and the simple letter "p", which in this case, means "pee". In full, it means "Be right back, go to go pee."
Guy1: I drank way too much water, brbg2gp
Guy 2: Ew.
See brb, g2g, pee, bathroom, pee-pee