The defintion of someone who is worse than a tool. Used to show great toolness; the tool that holds tools. Use with great brevity as to not dilute the meaning.
"Did he just say neon lit doorhandles are awesome? What a toolbag"
A person who is the most annoying one-upper, douche bag ,tool around, a tool of such unimaginable proportion the term "Tool shop" is the only thing large enough to describe this individual .
They are quite literally the mother of all tools .