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*
does everything have to mean SOMETHING? no, and this is a good example. that's why the phrase is funny; it doesn't mean anything. it's just kip's dry, meaningless humor.
A fantastic example of excellent taste in insulting one or many other persons, a divine insult with the ability to be used in an situation known to mankind
originating from the insulting term 'your mother'
as heard in movie: Napoleon Dynamite(2004). said by character 'Kip'
TRUE DEFINITION: Meaning that your mom is basically a whore and its calling her one. Get it? Your moms still in college cause she had you when she was 14! A very good insult because most people don't understand it but your still saying it without say anything very inapropriate or bad.