a sober hang is a hang-out or catch-up with an individual that you met whilst drunk. often making out or other acts of drunken passion were involved in this night of drunk introduction. sober hangs are avoided by bro's at any cost.
the "pregaming" of the sober-hang is a good way to set the illusion that one is a genuinely caring human, hanging out with your new friend sober, whilst actually avoiding the awkwardness that 'sobreity' can cause after a night of extreme inebriation.
melissa: sober hang today?
kallum: nah can't today sorry, you out tonight d00d?