The person in the group that is designated to hold the weed whilst the group is moving areas. Usually a dumber person, such as certain jocks or the distant friends.
Brian is so weird, the only reason we keep him around is to be the Joint Guard .
AD guy: damn dude my last deployment fucking blew.
Guard Bro: yeah flying for Southwest has been really kicking my ass too.
male 1: Fuck's sake, did you see how short Shirley's skirt is today?
male 2: I have seen the promised land, and there are no clam guards in it.