Pulling A Warren

A guy being sweet/cute but kind of creepy at the same time. shouldn't really be hitting on you/flirting with you due to age, current relationship status, etc. yet, they still do.

Girl 1: "He's texting me & being really cute, but i have a boyfriend & he knows it."
Girl 2: "He's pulling a warren."

(8th grade girl) : "This senior is hitting on me! Totally pulling a warren."