B:just pull a mosby on her, dude.
C:yea man, you can mosby the crap out of her.
Same for a woman towards a man.
I.e. the exchange between Barney and Robin in How I Met Your Mother, and also the reason for the name itself - Ted Mosby from How I Met Your Mother.
"Tim just pulled a Mosby on Rachel"
"Oh God, he's never going to be able to get with her then. She was talking about how much she liked him just last week too"