Designated Sober Buddy, the non-vehicular equivalent of a designated driver. This person's job is to be 100% sober, in order to ensure the safety of a small group of people who are drunk, stoned, crossfaded, or otherwise intoxicated
Person 1: Yo how fucked up did you get?
Person 2: Everything was chill af, we all got home ok cuz we brought a DSB
