You have ever received?
I will start. Not the most ridiculous one, but in my top 10.
Woman demanding that I check in the back for a certain colour of a dress she wanted otherwise she will have me fired. After 5 minutes of her moaning she can't get it anywhere and me trying to explain that it's because it's not even made in the colour she wants, I went. I needed a toilet anyway 🙈
A customer ordered spicy italian sub. It's on a picture. It has a description there, he watched me to put pepperoni and salami in. Came back few minutes later FUMING that it's not vegetarian.... Sent a complaint to a head office about it too.