Luke Guystalker

A male or female stalker of a male. This stalking can include but is not limited to: unexpected public sightings or run-ins, stalking by electronic means, and overall obsession.

Dude 1: "Hey didn't we go to high school with that kid over there?"
Dude 2: "yeah I see him all the time, I'm starting to think he's Luke Guystalker"