weaselsnatcher
a weaselsnatcher is a dude who is good at picking up chicks who are "weasely" or "squirrely" : they seem to like you but then get away. A weaselsnatcher is the guy who always seems to get a date with (or go home with) that chick.
man, theres that girl i tried to pick up last week, going home with your brother. He is such a goddamn weaselsnatcher.