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.
sidechick is 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
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.