a broken T-Mobile Sidekick whose screen, when flipped, turns a full 360 degrees
"Yo, check it out, I just dropped my Sidekick 3 and now I've got a Sidekick 360!"
by notter87 August 31, 2008
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Being unable to be the main character in your life, always looking for someone to fill the void.
It defines a person so insecure that they actually look for leaving in the shadow of their best friend that they have chosen.
Eventually they will adopt the personality of their best friend to be liked in social settings.
Gretchen in Mean Girl that would do anything to look like and be liked by Regina. And at the moment she is no longer popular, she switched to Cady. She has the sidekick syndrome, incapable of being her own person.
by TReneee November 22, 2020
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the newest phone produced by Danger and distributed by T-Mobile that is significantly better than previous models of the sidekick. the popular swivel-phone has a brilliant large and very bright full-color screen, and has all of the cool features such as AIM, Yahoo, MSN, e-mail, myfaves, texting, picture messaging, a camera, a music player, web browser, calendar, notebook, etc. games, applications, ringtones and themes are available for download. other features are the expandable memory slot, bluetooth, and mood lights.

obviously way better than the sidekick 3, sidekick 2, sidekick id.
it was a little more expensive, but my sidekick lx kicks your sidekick slide in the fucking face. really.
by KoiKoiKoiKoi May 26, 2008
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A very obsessive Sidekick user/Skank Whore
Someone who abuses their Sidekick privileges and who also is a dirty slut and or cunt.
Lauren uses her Sidekick 24/7, She must be a Sidekick Slut.
Due to the recent Sidekick data loss many Sidekick Sluts committed suicide.
by kmdjfkerwg October 13, 2009
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An average looking girl who tends to hang out with a more attractive girl who generally gets most of the attention and free drinks. Said 'sidekick girl' is usually left off to the side.
When Madge and Janey got to the club it was easy to tell which girl was the Sidekick Girl. Madge was immediately asked to dance by several men while Janey stood on the sidelines holding Madge's purse hoping some kind gentleman would at least say hello.
by Tabloid82 November 27, 2010
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One of the sweetest things a person can do to another person in order to kick their ass. Totally awesome. There are few things more impressive than a well-executed flying sidekick.
Person 1: "Dude, I'm sorry I spilled your drink, please don't flying sidekick me."

Person 2: "Hwaaaaa!"
by Self Serve February 26, 2013
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a Cell Phone mobile media device lost in a Taxi, found by others and not returned. Thieves are usually tracked down and embarrased in a blog by a guy named Evan.
Looks like the stolen Sidekick saga has come to a close.
by Darryl G. June 22, 2006
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