Miacore
A manipulative and toxic girl, typically high school aged, who jumps from guy to guy without aby real concern for the relationship. She is very self centered and acts in ways similar to a slut.
Person 1: Hey did you hear about her? That's her fifth one this week, they're already at third base.
Person 2: That is so Miacore I swear.
Person 2: That is so Miacore I swear.