trustbuster
noun[C]
LAW,FINANCEinformal(alsotrust-buster);(trust buster)uk/ˈtrʌstˌbʌstər/usapersonororganizationthatworkstopreventillegalarrangementsbetweencompanies:
He washiredas afederaltrustbuster by theJusticeDepartment.
trustbusting
noun[U](alsotrust-busting)
Theextentto whichconsumershave benefitted from trustbusting is hard toprove.
Severalcompanieswere targetted in the government'slatesttrust-bustingexercise.