Top Definition
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."
by mikehockishard May 24, 2011

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