To make a fool of or mess with someone; confirming that one is a tool
Me: Hi your four shirts all on top of each other with popped collars look awesome.
Tool: Yea I know. All the cool kids are doing it. Also bitches can't resist the popped collar. I'm getting laid tonight. *high five*
Me: I was being sarcastic. No one is gonna want to have sex with you. You look very silly. I was totally tooling you.
by shmaters gee April 12, 2009
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The act of being a tool, i.e. doing work when you should be out raging
Bob: (at 9pm on a Friday night) Dude, are you seriously going to be tooling all night?
Derek: Yeah, I've got a midterm Monday.
Bob: That's what Sunday night is for, you fucking tool.
by WillHandsome March 3, 2007
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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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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 19, 2003
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Slang for a gun, usualy a semi auto pistol or revolver.
"Man, I swear to god Im bout to buss the tool on this nigga"
by be quiet December 19, 2008
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