Top Definition
Is a customer that is very crusty and rude.
When an employee complains that they dealt with a crustomer.
by nolan gray October 15, 2006
A crusty ass customer who can't recognize the difference between customer service and flirting.
That crustomer just rolled up in the bank and told me I had a beautiful finger when I showed him how to use the ATM.
by Therealhneal January 10, 2015

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