2:A cocky asshole who doesn't realize how much of a dick he/she is. Tools tend to over gel their hair (it looks like they just snapped into a slim jim), where overly tight polo shirts/oxfords, and over-tan until they are as orange as an oompa loompa. The males of the tool species also tend to go to the gym just so they can talk about going to the gym. The opposite of a tool is a douche bag.
2: holy shit! that oompa loompa musta just snapped into a slim jim! oh wait, its just one of those tools from the jersey shore.
"Tool is our friend. We call him that because he is one."
People who listen to Avril Lavigne, are tools.
People who think Sum 41 is a punk band, are all tools.
best music ever. period.
<TOOL fan> listening to TOOL.