Telling someone romantically involved with you that you are in love with them, completely out of the blue. Making them be completely repelled by you in any romantic way.
A:damn man, i gotta get rid of shelly, Im not into her.
B:just pull a mosby on her, dude.
C:yea man, you can mosby the crap out of her.
B:just pull a mosby on her, dude.
C:yea man, you can mosby the crap out of her.
by Tedmosby76 May 21, 2009