Girls you have sex with on and off whilst you're looking for the one you want to go out with.
Georgia: Duncan and Siobhan slept together again last night. Do you think they're gonna go out?

Rafe: Nah, Duncan fancies Jodi, not her. Siobhan's just his sidechick.
by wolfsbaneT9 August 7, 2013
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Female version of a "wingman". I.e. a female willing to help her friends find successful romantic partners and avoid awkward social interactions.
"Jenny would've ended up with a real loser if it hadn't been for her sidechick".
by SideChickie January 9, 2011
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A woman who provides a male show host (primarily in radio) with occasional, or sometimes frequent input and conversation on the current topic. Usually a producer or news reader, she is rarely credited formally for contributing to the show but is always on the cusp of chiming in.

A sidechick can be present from the outset of a show, but usually is added in when ratings drop to increase female demographics.
"I like this guy's show but who is that girl that he keeps talking to in the studio?"

"Oh, you mean the sidechick?"
by The Road Kraken November 14, 2009
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As a foursome of loser guys started to circle Lisa, all she could think of was, "Where the hell are my sidechicks?
by JMo April 18, 2012
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Female equivalent of wingmen. A girl on a mission with her other girl-friend to find baes.
Did you see Chloe and Sarah got two fine boys? They must be good sidechicks.
by clossacsarman January 10, 2015
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A sidechick is someone who is not included a situation but likes to get involved and says unnecessary stuff behind the main person or one who follows around a main person
A main person is shouting or getting rude to you and the sidechick will try to get involve and say inrelevant things jut to be relevant
by sandysunshell October 12, 2017
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When you are an expert in the field of "side chickery". You are the 1 in 100,000 who went from side chick to wifey and believe that it is possible for anyone to achieve. You are the master of the art of being a side chick.
Meghan is sad because her ex is with someone new, her friend Kathleen is a master at sidechick-ology and helps Meghan get her man back.
by sidechick-ologist July 5, 2017
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