dirty siara
When you string a girl along and take advantage of her vulnerability and trust to try and get with her. You basically pretend to be her friend in the hope that she'll put out.
Bro 1: "Hey man, how's it going with that chick from college?"
Bro 2: "Ha, pulled a Dirty Siara on her"
Bro 1: "Oof, that's cold."
Bro 2: "Ha, pulled a Dirty Siara on her"
Bro 1: "Oof, that's cold."