Complete the cynical manager's speech to the new intern.

You have to be tough to survive in the corporate world, kid. It's a ___ world out there!

The correct answer is dog-eat-dog.

The idiom "dog-eat-dog" describes a fiercely competitive environment where people will do anything to succeed. It is frequently misheard as a "doggy dog" world, which sounds like a much cuter and friendlier place, but is sadly incorrect!