A person who wanks someone off into a bag. Not to be confused with the Manhattan Wangbagger
me: I got a hj last night
friend: nice!
me: yeah into a plastic bag
friend: Oh she's a wankbagger!
A person who wanks someone off into a walmart bag.
Connor: Last weekend I stayed with a girl in Manhattan and she wanked me off into a walmart bag
Justin: The Manhattan Wankbagger strikes again