English

Noun

side piece ‎(plural side pieces)

1. (slang) A mistress; a woman with whom a man carries on an affair without having the intention of forming a serious relationship.
   • 2004, Wendy Williams and Karen Hunter, Wendy's Got the Heat, page 104:

     I was already putting two and two together that I was just a side piece — a booty call.

   • 2008, Lenora Adams, Baby Girl, page 105:

     You basically told him you're cool with being his side piece as long you're number one.

   • 2014, Shelly Ellis, The Best She Ever Had, page 246:

     I'm just tired of being treated like a side piece and not a wife.

Synonyms

• bit on the side
• side bitch (vulgar)
• side chick