A toy line that was launched in 1984, robotic humanoid characters that could transform into vehicles and other objects such as semis or boomboxes. Their slogan was "more than meets the eye".
A TV show was launched the same year. The show featured pretty nifty writing for its time. Revolved around battling robot races from the planet Cybertron, the Autobots (good guys) and Decepticons (bad guys). They eventually crash-landed on earth and continued their battle for objects called "Energon Cubes", which were the power source for all transformers. The Autobots, led by Optimus Prime, were aided by human teenager Spike and his father Sparkplug (yep, those were their names) in their many battles against the Decepticons, led by Megatron. Your basic classic story of good vs. evil.
Also spawned an animated feature in the late 80s, featuring the death of Optimus Prime, and his resurrection in season 3.
Spawned various spin-offs such as "Beast Wars", "Transformers Armada", and "Transformers: Cybertron". But the best is the original.
A live-action feature film is coming in July 2007, under the direction of Michael Bay, which, depending on your taste in movies, could go either way.
Theme Song:
Transformers, more than meets the eye. Autobots wage their battle to destroy the evil forces of the Decepticons. Transformers, robots in disguise. Tranformers, more than meets the eye. Transformers.
by HueyFreeman September 14, 2006

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A transformer is an electronic device generally containing two copper wires coiled around an iron core.

There are many types of transformers with different sorts of uses.

Some transformers are used for isolating components such as a microphone from the amplifier so that if you plug in the wrong thing, it may prevent damage. This also filters out DC current.

Others such as the kind you see on a powerline or inside a TV change the Current/Voltage Ratio and is read like this for example: 1:2,1:30,1:4...ect.

This device works by transfering energy from one coil of wire to the other via a magnetic field.

A flow of electricity is made in the oppisite wire when the field generated by the other coil expands or contracts.

Note that only AC current can travel through a transformer, that, or a DC current being switched on and off.
Transformers are widely used in all sorts of electronics.
by Weylin6 January 02, 2008

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a Transexual person. It looks like a beautiful woman from afar but up close transforms to a man.
Guy 1: Holy crap dude..I had a scary experiance last nite.

Guy 2: Dude what happened?

Guy 1: I saw this really hot chick at the bar, we drank a few beers and things started getting kinda hot and heavy..so we went to her place and.....

Guy 2: and what happened dude....

Guy 1: It turned out she was a TRANSFORMER!!...so I got the hell outta there scared shitless...

Guy 2: DUDE!!! you didn't have to run...I wasn't gonna hurt you....
by ArchangelG October 13, 2010

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When driving behind someone (most of the time elderly), and their silhouette is not visible from your point of view, giving the impression that the car is being driven by itself.
I was driving on I-95 when this car cut me off. I saw it was a transformer so I sped past and blasted the driver with obscenities.
by BVH1286 June 29, 2010

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A girl that looks really hot from a distance, but as she gets closer, she transforms into an ugly ass bitch.
Transformers, uglies in disguise..."
by jackbauer133 November 27, 2009

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A Female Human who has the ability to somehow morph her looks from totally hot to totally ugly.
Jack: I took out that chick Debbie from accounting last night, what a letdown.

Mike: Oh man, she is so hot, how was it a letdown?

Jack: Nah man, not hot at all, shes a Transformer.

Mike: That Sucks.
by The Batman1 September 17, 2009

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While having intercourse doggy style with a woman(vaginal or anal), when you're about to ejaculate, scream "'Insert name' TRANSFORM!" And rollover and land on your back.
I totally pulled a Transformer on her last night, dude!
by WolfPack1794 February 02, 2011

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A man/woman who from far away looks good looking but when you get closer you see that they are not so desirable
Ooooh look at that guy Bri, oh wait never mind he's a transformer...
by Hopesterocks October 29, 2010

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