dog eat dog UK /dɒɡ iːt dɒɡ/US /dɔɡ it dɔɡ/ adjective1 •(informal) Ruthlessly acquisitive or competitive; of a business or other set of circumstances, trying to succeed at the expense of other people.In this company it's dog eat dog. If you don't do better than the rest, you're on the street in next to no time.
