People who wander around aimlessly and always seem to get in your way in stores and supermarkets, chatting on their cell phones and paying no attention to their surroundings.
A person with nowhere to go and nothing to do who wanders the sidewalks aimlessly in a swervy, slow path that blocks the paths of people who do have somewhere to go and something to do.
I was supposed to be at the Museum of Natural History thirty minutes ago but my path was slowed and at times completely blocked by roving packs of meanderthals.