Brb

It means be right back but pretty sure we all know that it probably means I'll never be back I'll just leave you waiting because I don't feel like talking to you

Person1: hey

Person2:sup
Person1:how you doin
Person2:I'm ok
*silence*
Person 2: brb
3 weeks later
Person 2:hey
Person 1: what were you doing for 3 weeks?
Person2: ummmm I was in school

Person 1: yea sure for 3 weeks
*Person 1 left the chat*