Dog-eat-dog is an idiomatic adjective meaning ruthless or competitive. Doggy dog, when used in the phrase doggy-dog world, is an eggcorn resulting from a mishearing of dog-eat-dog.


Business is business, and Hollywood is as dog-eat-dog as every other industry. [Reel Loop]

We are locked in the hermetic, dog-eat-dog world of the court, where every smile is false. [Guardian]

They think they can do anything they want, that it’s a dog-eat-dog market and all these sophisticated buyers know that. [CNN Money]

In the dog-eat-dog world of pickup truck one-upmanship, you certainly can beat a truckmaker while it’s down. [Chicago Tribune]

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