The act of going somewhere solo and not inviting the boys or going with a diffrent group of boys and leaving your real boys hanging, this aplies to woman also but it is still called dtb
E: Chillin in the city
Charlie: Wtf your supposed to be coming to the party dtb!
Guy1 to Guy 2: dtb?
Guy2: sure, gimme a min.
Guy2 to Guy3: hey man me and a few others are dtb, u in?
Guy3: Fuck yeah, lez bang!