Định Nghĩa và Ý Nghĩa của "my eye"

What is the origin of the idiom "my eye" and when to use it?

The idiom "my eye" is an informal expression used to express disbelief, skepticism, or rejection of a statement or claim. This expression was originated in British English in the early 20th century, but the exact origin of this idiom is difficult to pinpoint.