Originating from the lackadaisy slam, "
Your mom." Made crazily
popular by Kip in Napoleon Dynamite (2004.)
This term is used basically whenever it is wanted, even if it is completely random or irrevelant to the subject at hand.
That's okay. At least my mom doesnt go to
college. She's a housewife.
Ann- Shut up
Bob! You suck!
Bob-
Your mom goes to college!
Ann- That is so last year.
Bob- Your MOM is so last year. HAHAHAHAHA!
Ann- *sighs and walks off*