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.

One who has difficulty determining their next course of action in traffic (sometimes going 10-20mph top speed), and, as a result, is not predictable and does not use their turn signal.

Similar to a modern day neanderthal.. this is an individual who is not only ignorant, abusive and always willing to spout hateful words to those who are smarter, but has the added bonus of being able to meander freely throughout the planet spreading their ignorance.

The word basically describes a weirdfunky sort of 'non-linear' and integral approach in day-to-day routine; much gets accomplished overall, though in what would appear to the outside (non-meanderthal) observer as a randomly chaotic, somewhat disjointed fashion. The great productivity achieved thru this process by its skilled practitioners may often seem antithetical to the methodology of it

Conversationalist that wanders from one subject to another with no apparent point, never reaching the end of the story.

Someone old enough, but still insufficiently intellectually developed to know that the universe does not revolve around them. This person believes that everything is all about THEM, they fail to take responsibility for themselves, their errors, and the way other people respond to their sometimes painfully self-centered behavior and thinking.