Someone who desperately wants to be a police officer, but for whatever reason is not in that profession. Combines the words wannabe and constable, the latter being the title of a police officer in Canada.
Someone who is known to have marathon wanking sessions, perhaps blowing out his or her mates so they can watch porn all day and go through several boxes of Kleenex.
Guy 1: "Hey where's Tom tonight?"
Guy 2: "Probably at home wanking over Redtube again."
Guy 1: "Man that guy's such a wankstallion."
A person who wants to be a cop so bad they go out of their way to police people.
Someone who wears apparel or accessories that officers might wear as part of their uniform like a flashlight in belt holster, a utility belt or a tactical vest.
He pulled a guy over because they were driving while using their phone. Such a wanstable!