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."

sidewalk friend

A sidewalk friend is the one in a group who automatically moves behind on a narrow sidewalk, assuming the least value in themselves.

Person 1: Hey, who’s that behind you?
Person 2: Huh? Oh, her? She’s nobody, just my sidewalk friend.