A turkey wanker refers to a person who imitates the movement of a turkey. Turkey wankers are generally very antisocial, and are excluded from society as a result. They often feel the need to pose as a turkey the moment they spot a camera in their sight, performing a photobomb. To become a turkey wanker, one must be a wanker and act like a turkey.
Rich looks like a right turkey wanker in that photo