The female who is Romantically involved with a man that she know has a girlfriend or wife. AkA BECKY... With the good hair as of April 2016
Side chick: Girl you know Ray right, I been with him for 2 years.

Friend: Girl Ray has been married to Sherelle for 5 years. They have been in a relationship for 10.

Side chick: Ye but he dont really love her tho.

Friend : So you Becky now! Girl you know thats his main chick shoot.
by Yonce27 April 25, 2016
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A Bitch that is dating a boy that is cheating on the Bitch and the Bitch knows y'all
Bitch I get Jb on Sunday!!

-stranger- she is a side chick
by Side chick hater March 11, 2018
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The kind of girls without a boyfriend who are often "the third wheel" in a relationship setting.
Usually these girls want to be with the guy whom they're associated with, but there was no agreement for them to go that step further.

The man whom the side chick is associated with is pretty indecisive about whom they want romantic relations with, but since they got hung up on several chicks, he might as well have his side chicks.
Julia isn't Jason's girlfriend. And Meghan isn't his girlfriend either. Apparently, they're his side chicks. Jason won't decide!
by whats_yo_name_pussycat March 10, 2018
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A dusty, thirsty bird that one keeps around strictly for beating up the hot box. You usually have to gas her up by alluding to the possibility of a relationship in the near future, in order to get the buns. A throw away broad that an individual wears out like a boss, unbeknownst to said individual's main squeeze. Side-chicks are usually cool with their status as a slide-off due to the fact that they either have no shame or they're blinded by love. Not someone that you'd want to bone without a rubber. Guys can be side-chicks as well which could be equally, if not even more pathetic.
My wife is headed to work so I'm just going to sleep until two in the afternoon and then call the side-chick over real quick to get my dick wet for a minute.
by YessCubanB June 23, 2014
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The girl a guy cheats on his girlfriend with because she's better in bed. Not always a bad thing to the girl and guy, just society.
I'm flattered to be the side chick because it means I'm better in bed than his lousy girlfriend is.
by thatonechickyuhdig January 2, 2015
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that bitch you keep on the side while you’re still dating someone
Myla sucked my dick last night and my girlfriend will never know. She’s the best side chick ever!
by mylathesidechick August 3, 2019
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the chick on the side of ur girl because she betta in bed but she is not the wifey or the girlfriend just a side plate dont ever fall for your side chick the only thing she gets from u is dick and she cant contact u in anyway
Kim: what is he doin with Felicia i thought deleah was his girl
Matt: no he is wit deleah that is just his side chick Bitch u is stupid
by NYKUH March 4, 2015
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