The person you are cheating on your boyfriend( or girlfriend) on
Oh no! My wife found out about my sidechick
by Hi I'm bobbob November 22, 2018
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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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The act of being made a side chick. Being made a sidechick when you were already the main chick.
"Harold sidechicked Lisa to go back to his girlfriend."
by Wafflemuggins February 23, 2021
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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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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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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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