Term used to describe and refer to a person, in any given situation where work is involved, who does as little as they possibly can without getting reprimanded, fired, or noticed by the people who are actually doing the real work. You can generally find dolittles at the water fountain, in the bathroom, at the snack machines, or fumbling around somewhere with some unimportant task, trying to look busy. Every workplace, and every job where a group of 4 or more people are involved has at least one dolittle.
Boss- "Hey Rob, I need you to run down to the store and pick up lunch for the crew."
Rob - "I'm busy, get one of the dolittles to do it."