Anyone who tries to act cooler than they actually are. Most tools are usually douchebags with negative self-esteem.

Synonyms: Asshole, poser, faker, douchebag, Dane Cook.
Man: Wow, Dane Cook is not funny at all. What an asshole.
Man 2: Damn, you're right. What a tool.
by BigCron August 12, 2009
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An often disliked person who screws people over instead of using common sense to deal with situations. Likes to command people to compensate for his small penis.
Wtf, Jerry really had to fuck us over this time. What a tool.
by Some dude1231 May 1, 2011
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An individual who behaves in their own self interest rather than adhering to a set of beliefs or morals. Someone who will act as though to seek approval on the outside, but is actually quite vain and selfish. Men of this variety tend to cheat on their girlfriends. Women tend to use men to obtain free drinks.
God, Brett is such a tool.
by redwikiwine September 10, 2009
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Almost synonymous to douche bag; the type of person that likes to show off their physique in public; wears athletic clothing in the dead of Winter (Basketball shorts with long black socks); laughs at their own non-hilarious jokes; under the false assumption that they are perfect; whines like a spoiled 5-year-old when something doesn't go their way
"Ben is such a tool in the morning when he thinks it's cool to choke people and throw them into the wall."

"Ben laughs like a walrus when he thinks his own jokes are funny."

"Ryan always sounds like he's on Oprah when complaining in Chemistry."
by mattyjoe28 March 31, 2010
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1: Someone who is used for another's purpose
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.
1: Tsk, tsk, it looks like becky found a new tool for herself.
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.
by Son of Stone February 22, 2010
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a guy who works out instantly gets a sweet tan, frosted tips in his hair, does anything mtv says is cool rooms with you after high school because you got into the same school and have been best friends for 10 years and completely changes himself into a mindless asshole who says brah after every sentence and ditches you every night for his new sweet friends and then one night you confront him about how hes turned into a complete piece of shit copy of every moron at a free rockstar energy drink giveaway and storms out and dissapears for three days only to come back looking suspiciously guilty and smelling of your girlfriend of 3 years perfume and completely ruins your life
i thought we were friend chris or should i call you by your new nick name topher cause your so cool now with you seashell necklaces and tapout shirts. oh you shop at pac sun too? you and everyone else!

tool.
by broseph69 September 3, 2008
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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 8, 2005
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