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262.
someone who is capable of ruining a perfectly good evening my doing one simple thing that pisses everyone else in the group off.
i cant believe he just did that. he is acting like a complete tool right now.
by mr. tool June 18, 2006
 
1.
One who lacks the mental capacity to know he is being used. A fool. A cretin. Characterized by low intelligence and/or self-steem.
That tool dosen't even know she's just using him.
by tt February 18, 2003
 
2.
A person, typically male, who says or does things that cause you to give them a 'what-are-you-even-doing-here' look. The 'what-are-you-even-doing-here' look is classified by a glare in the tool's direction and is usually accompanied by muttering of how big of a tool they are. The tool is usually someone who is unwelcome but no one has the balls to tell them to get lost. The tool is alwasys making comments that are out-of-place, out-of-line or just plain stupid. The tool is always trying too hard to fit in, and because of this, never will. However, the tool is useful because you can use them for things; money, rides, ect.
"Let's drive to Chicago from Iowa. Oh man, we need money. Hey, let's ask tool to come, he'll spot us the cash!"

"Tool is our friend. We call him that because he is one."
by Shannon J. August 08, 2005
 
3.
someone who tries too hard. a poser. one of those chic's who holds the sign saying "Carson Daly is Hot." the asstard who goes to a rock show because they heard one of the songs on the radio or mtv. or someone who insists on wearing velour sweat suits. Avril Lavigne.
Jane is a tool because she dresses like Avril Lavigne while listening to New Found Glory and Dashboard Confessional just becuase Carson Daly told her to.
by sham February 08, 2003
 
4.
someone who is a complete idiot/ one who is used by other people, and usually dosen't even realize it/ someone who can't think for themselves/ an asshat.
People who wear huge logos on their shirts are tools.
People who listen to Avril Lavigne, are tools.
People who think Sum 41 is a punk band, are all tools.
by Anonymous April 11, 2003
 
5.
Best band of all time with Adam Jones on guitar, Danny Carey on drums, Paul D'Amour once on bass but now its Justin Chancellor, and last but certainly not least the vocals and the style that is Maynard James Keenan. Progressive rock band from the early 90's, introduced a lot of new things in music, including throwing time signatures out the window. Albums out:

92-Opiate
92-Undertow
94-Aenima
94-Salival
01-Lateralus

best music ever. period.
<some guy> what are you doing?
<TOOL fan> listening to TOOL.
by Jim-n-Tw3ak March 11, 2005
 
6.
A sad soul who is being taken advantage of without realizing it
-Dude, I need a ride to the party.
-Ask (insert name here). He's a tool.
by Emma February 15, 2003
 
7.
Someone who writes a definition for a word on Urban Dictionary that has been posted a billion times before. If the definition is already there, why the fuck would you waste your time posting the exact same thing?
A tool is a person who is used by other peo--STFU already!

I wrote this on an impulse. I wrote that on an impulse. I don't need to justify anything to you! Whatever, its just the internet.(ahhh closure)
by smelly arthritis 2 August 29, 2006