dogu bummer is a rare Japanese game series on PS3 and Dreamcast. In it you play a avatar called Greek Darran who's sole mission is to bum dogs under a strict timescale.
Dogu Bummer 2 is the best in the series, you get to play as the dogs as well as Greek Darran. Greek Darran be bear Dog Bummer. You get me?
Any tourist who goes to a third world country merely to live in luxury for cheap, while abject poverty and hunger exist all about them, is nothing but an unprincipled bummer slummer.
A belly bumper is a person who is unmotivated, lazy and/or lacks any sense of completion. A person who possesses this type of behavior can partake in said belly bumping activities.
A belly bump is also the clear act of two belly bumpers uniting!
That guy just belly bumped his way through work today!