the definition of tool....is in regards to being a prison guard's "friend"...other in mates will think of you as a "toolbox". Therefore, sticking there tool in your ass!
Kelly took a pack of smokes from a prison guard, later that day he was called a tool, and took it up the bum later.
Lindsay and Katie are huge tools for scheduling their drinking time yesterday... and are now toolboxes because they also schedule their smoke ride to follow.
A person who is a complete round-about. Someone who tinkers or toys with things for no reason. Someone who fixes things that aren't broken or who just wanders around without being aware of their surroundings.