What does 'obl' mean?

ok so let's just call them...melanie and courtney ok? melanie and courtney were sitting near ummm lets call him darren. out of no where darren asked one of them (i'm not sure who, they just told me he asked them...) so darren asked 'is your dad obl?' none of them know what this is, so they asked me but i dno O.o? if u can't think of it as something nice it's probably kinda mean cuz he is mean >.> they kept asking him what it was but we don't know, so do you have any idea's? oh and it might not be obl, maybe olb or somethn lol just have a guess. thnx