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
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!
The act of jerking someone off into a plastic wal-mart bag while in Manhattan.
Justin: How was your trip to Manhattan?
me: it was good, I got jerked off into a walmart bag
Justin: What?! She was Mahattan Wankbag'n!