Look at this misfit. Flea infested dreadlocks, narcissistic tattoos, no clue, thinks the locals love him 'because I'm blending right in with this cool ethnic culture. Backpacker? What a twat. Right, he's a perfect example of a twatpacker.
A heinousperson, generally female, who annoys everyone to the point that they want to call him/her names. This name suffices in underlining the said persons annoying nature.