Used mostly in the Baltimore area, a blood traitor is a girl that dates from a "forbidden" school.
"Forbidden" schools include but are not limited to:
Boys Latin
Calvert
Cathedral
St. Pauls School for Boys
Most of the "offenders" either go to Bryn Mawr (BMS) or Calvert.
Alice: God, can you believe
Lilly's dating a
BL guy?
Kristen: I know. She's such a blood traitor. Remember the
Calvert guy she dated?
