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
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
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
That guy who makes us shake our head in disbelief but at the same time makes us feel better about ourselves since we are not him.
"Jake just spent $80 buying those hot chick shots and then they walked off with those other guys!" "He's such a tool!"
By toolguru
(n.) - an individual who willingly changes his or her behavior for personal gain or profit. In this context, a tool is similar to a poser, with one important distinction. Because a tool does not consider his actions beyond rudimentary cost/benefit analysis, he or she will often be co-opted by corporations or powerful interest groups to support the lame or corrupt positions held by these organizations. A tool therefore, is quite literally an instrument of the man.
Mitt Romney is a tool.
By Kenny Genius