- The definition of dog eat dog is something or some situation in which there is fierce, ruthless competition.
An example of dog eat dog is a competitive sales environment where everyone is trying to beat out their co-workers to make the most sales, even if they have to lie and cheat to do it.
Used by arrangement with John Wiley & Sons, Inc.
dog-eat-dog - Cultural Definition
Ruthlessly competitive: “You have to look out for your own interests; it's a dog-eat-dog world.”