Insult simular to "your mother" but more insulting because your not only insulting their mother, your instulting all their maternal lineage. (Thats their mum, grand mum, great-grand mum ect)
Father: "What subject did you score highest in school, son?"
Pretentious teen rebel: "Your maternal lineage."
Pretentious teen rebel: "Your maternal lineage."
by sami yamamoto June 11, 2005