Friends In Common
Used mostly with facebook. For the lazy people to abbreviate it.
F.I.C stands for "Female-Impossible-Crush"
that kinda girl every guy or lesbian wants to have some kind of relationship with but they can't and they see the task of making the girl pay attention to them hard and "Impossible"
Sandra: Damn, Génesis is my fucking F.I.C
Diane: your what?
Sandra: it means "Female Impossible Crush"
Diane: ohh, lmao that's true.