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15.
1) a person who is not a loyal individual. a person who talks shit about person a when he/she is in the company of person b and talks shit about person b when he/she is in the company of person a. a person who is superficially a good friend.

2) also can be used to describe actions that are of a disloyal nature.

3) also can be used an exclamation when an action is of a disloyal nature

antonym: cheetah
1) She's always doing things like that behind her so-called friends' backs - she's such a chameleon.

2) She definitely lied...that was so chameleon.

3) (a friend just threw water in your face and you exclaim) "CHAMELEON!!"
by Lucy Blair March 15, 2006
 
1.
A person who adjusts themselves to fit into whatever happens to be cool at the moment. Includes their appearance, their interests, their opinions, their personalities. often reffered to as 'scenesters' 'try-too-hards' or 'idiots'.
In lieu of the new emo fad, the chameleon bought a pink shirt, tight ball-squeezing jeans, cut his hair emo style, and parted it over the side, covering exactly 1/3 of his face.
by useful idiot March 22, 2006
 
2.
(v.) to take on the personality of the person you're with at the moment. this is either done subconsciously, or as a sad attempt to make people like you

(n.) a person who chameleons on a regular basis (i.e. they act different for every person they hang out with)
girl 1: you were so hyper when we were hanging out with Pete, what was that about? you were acting just like him

girl 2: i can't help it, i'm a chameleon around guys
by erica10 March 05, 2008
 
3.
A chameleon is a middle-sized reptile that can change colors.
They are rather bizarre-looking, because their eyes can point in different directions.
They are famous for their ability to change their color to match their surroundings, hence the nickname, "Chameleon" given to anyone who changes with what's "Popular".
me: I just saw a chameleon!
friend: oh, they are so lame! they think they have a life but they don't
me: no, I mean the reptile
by musicat November 14, 2010
 
4.
A person who tries to blend in with a certain crowd, usually preps, just to get the satisfaction of being cool. Of course, they are just fooling themselves that they have a life and are at all interesting.
"Dorothy is SUCH a chameleon now...it makes me sick."
by Emma Wilson June 21, 2005
 
5.
Similar to a survivalist, but with several important differences. Chameleons prepare themselves for scenarios in which failure would result in a large loss of life or societal collapse as opposed to survivalists who simply wish to prepare for an apocalypse. They dress in a paramilitary style or are nondescript. Their preparation for emergency situations often makes them the civilians who first respond to medical situations or accidents. Most are concentrated in urban areas where their skills are most likely to be useful.
Before the paramedics arrived, we saw a couple perform CPR on the victim. They both had large backpacks filled with medical supplies and took control of the situation. I think they were Chameleons.
by Kertap September 17, 2008
 
6.
referring to a female who is pretty sometimes, and sometimes not pretty
Pedro: Crystal was hot yesterday, but today she doesn't look good at all.

Jared: Bro, she's a chameleon.
by Alex December 05, 2004
 
7.
A person who blends to a womans desire in order to win her over to fill his lustful desires
You see a girl at the bar who is hot, emo, punk, goth, mexican, cacausian, black, asian, middle-class, upper-middle class, and or rich

You go and sit at the bar next to the lady

You then engage in remote conversation about rich and successful your life is, but make sure to bend a different way to a different pop-culture if you know these won't be applicable

At this point you have to have already figured out what backup intel you need to ensure that your not caught, because she is gonna wanna know your sources.

Make sure not to go under yarns about anything personal or eventful, because 9 times outta 10 she might have an iPhone(come on people now days...Yeah iPhone owner) so make sure to be very vague, but not too vague.

After getting a successful convo in buy her a drink of her choosing.

After engaging in a real heart to heart, you are pretty much on the train to successful Chameleonism, but your not there yet.

Make sure to always contour yourself, and almost resort to mimicry if applicable to keep her talking to you.

Make sure to always dress according to who you wanna pick up the night.
by GuitardHero88 Xbox Live April 10, 2010