What is no mames wey?

"No mames wey" is a popular slang expression in Mexican Spanish. It is often used to express disbelief, surprise, or frustration, and can be roughly translated to "No way, dude" or "Are you kidding me?" in English. The phrase combines "no mames," which is an informal and slightly vulgar way of saying "you're kidding" or "don't mess with me," with "wey" (also spelled "güey"), which is a colloquial term for "dude" or "bro."

It's important to be cautious when using this phrase, as "no mames" is considered informal and can be offensive in more formal or sensitive settings. However, among friends and in casual situations, it is widely accepted and used.