Voluntourism, an act carried out by "voluntourists", is when hoardes of - generally - the great unwashed backpacker brigade descend on a place to do have a jolly nice holiday - usually at precious little cost to themselves - and do the occasional bit of good work.
Looks good on one's CV as a gap year activity.
Voluntourist 2: No, tsunami voluntourism is old hat now. All the bars are closed and hardly anyone is living in the houses built, anyway.
Voluntourist 1: Good point. (pauses) Sierra Leone?
Vouluntourist 2: Are you insane?