cut-throat
adjective[usually before noun]
(US alsocutthroat)uk/ˈkʌtθrəʊt/uscompetingin astrongandunfairway, withoutconsideringanyharmcausedtoothers:
acut-throatbusiness/market/world
Scrapping ofpricefixinglegislationledto acut-throatbattleforsupermarketcustomers.
Manyfirmshavefallenvictimtocut-throatcompetition.