the other woman; also known as the mistress
; a female that is neither a male's wife or girlfriend who has relations with the male while he is in another relationship
Kimmy: Look at Tina and Josh...are they going out?
Sally: No Kimmy! Josh is dating Laura. Tina is just his sidechick.
A position allocated to a girl which is neither a wifey or a girlfriend but a side dish like nandos rice
"Hey, look at those sidechicks Amy, cheyan tattendaa"
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.
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".
Female equivalent to the Wingman.
As a foursome of loser guys started to circle Lisa, all she could think of was, "Where the hell are my sidechicks?
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?"
Like the word "sidekick" to a superhero, a side chick is a girl that tags along with another more popular girl or guy.
Brittany's side-chick is sooo lame.