Mail to the manager

A classic phrase!

"Mail to the manager" is a common idiomatic expression that means to complain or express dissatisfaction with a product or service to the highest authority, usually the manager or CEO of a company. It's often used when a customer is unhappy with a purchase or experience and wants to escalate the issue to someone who can resolve the problem or provide a refund or compensation.

Here's an example of how you might use this phrase:

"I'm really unhappy with the quality of this product. I've tried to resolve the issue with the customer service team, but they haven't been able to help me. I'm going to have to mail to the manager and see if they can do something about it."

In this context, "mail to the manager" is not meant to be taken literally - it's a figurative expression that means to send a complaint or grievance to the highest authority.