donotdestroy:

dog-eat-dog

adjective

UK /ˌdɒɡ.iːtˈdɒɡ/ US /ˌdɑː.ɡ.iːtˈdɑː.ɡ/

used to describe a situation in which people will do anything to be successful, even if what they do harms other people:

It’s a dog-eat-dog world out there.