twat trapper

An opportunistic goodlooking man, usually younger, who uses his charm to get a woman, usually she is older, lonely and unattractive, but has wealth and status to fall in love with him in a short period of time in the hopes she will die soon thereafter and he will inherit her fortune.

The male version of a gold digger looking for a quick come up.

Man 1: Must be Friday night?
Man 2: What do you mean?
Man 1: There's Jack. Everyone knows he's a twat trapper.
Man 2: What? A twat trapper...