Some person who has a "tool" or a means to fix any problem, or fit any criteria in multiple situations.
A man accustomed to wielding large tools.
A person who is consulted when requiring help for some problem.
Miss Bessy: Hey, toolbox, would you happen to have a large cattle prod in your pocket? I'm scared to walk home alone!
Toolbox: Why, yes i would!
leet speak for "hello" for gamers too lazy to type out the whole word. also used in IRC chatrooms.
ShadowGod has joined #anarchyonline
<ShadowGod> 'lo comrades, i'm too lazy to type hello and trying to be e133t at the same time!