Ur brother mother

When you are arguing and ur friend says ur sister mister u say ur brother mother. And you win the argument.Simple as that.

Brad:Yo Carl ur mom gay
Carl:No u
Brad:No no u
Carl:Ur dad lesbian

Brad:Your mom and dad both gay together

Carl:Ur granny tranny

Brad:Ur sister mister
Carl:Ur brother mother

Brad:*evaporates*