A person or persons coming to eat at a restaurant without booking or trying to change the menu for their bullshit intolerance's
The cuntstomer wants to order a gluten free pancake.

Just had a table of 15 cuntstomers walk in
by 187chef May 17, 2016
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the people slave-laboring at these electronic cesspools
by s0lipsist December 28, 2005
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A cunt of a customer
I'm sick of dealing with this difficult Cuntstomer
by WGW November 7, 2013
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The occasional customer that doesn’t pay attention to the information they are given to allow for a simple and easy transaction. Instead, they hear only what is convenient for them and fly off the handle when things don’t go exactly how they intended.
“This cuntstomer is lighting up my phone and complaining that her furniture set isn’t in stock when I told her it would be a week and a half.”

“If this cuntstomer that adds 5 shots of espresso to her Frappuccino keeps bitching about it being too soupy, I’ll quit!”
by Salesslueth84 March 23, 2018
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Bitchy customers that have ridiculous expectations when returning merchandise that has clearly been used for an extended period of time without a receipt or tags for no good reason other than they are broke and need money.
In retail: "The customer is always right," except when they are a cuntstomer.
by - fatbagder January 17, 2016
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A customer who acts like a real cunt.
"Did you hear that lady chew me out because she had to wait in line for 10 minutes? She's a cuntstomer if I ever met one."
by grimm23 January 31, 2022
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It's when a Karen is a complaining pain in the ass customer no matter what a restaraunt or store does for them.. they would complain about winning the lottery because it wasn't enough or complain that ice wasn't cold enough.
That cuntstomer would complain ice wasn't cold enough
by Paparic2000 February 13, 2022
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