Put up or shut up

Put up or shut up is an idiom; controversy rages concerning its origin. An idiom is a commonly used word, group of words, or phrase that has a figurative meaning that is not easily deduced from its literal definition. Often using descriptive imagery or metaphors, common idioms are words and phrases used in the English […]
from Grammarist
https://grammarist.com/idiom/put-up-or-shut-up/