Your full name, not shortened in any way and including all middle names, said by your mother in a very stern voice when she’s caught you in the act of doing something indecent.
“William Jefferson Clinton, what is that intern doing on her knees in front of you?”

Bill wasn’t impeached but he knew he was in trouble when his mom used his Sunday Name
by FogeyofFarne December 7, 2020
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Your Sunday name is the alter ego you take on by day 3 of a festival or weekend of being a complete party goblin. The raw, real (or imaginary at this point), hot mess of an incredible human being you feel like when you’ve released control and given to the good times wholeheartedly.
Friend 1: “Carly isn’t here anymore, Sheila has arrived!”
Friend 2: “What? Who’s Sheila?”
Friend 1: “Oh, that’s just her Sunday name.”
by April 10, 2023
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