From Longman Dictionary of Contemporary Englishno holds barredno holds barredLIMITwhen there are no rules or limits on what you are allowed to do It seems there are no holds barred when it comes to making a profit. → hold
Examples from the Corpus
no holds barred• There are no holds barred when it comes to making a profit.• He told me he was going to shoot the whole works, no holds barred.no-holds-barredˌno-holds-ˈbarred adjective [only before noun] a no-holds-barred discussion, situation etc is one in which there are no rules or limits Viewers had been promised a no-holds-barred interview with the former mayor.Examples from the Corpus
no-holds-barred• Everyone puts on an identity-erasing disguise and leaps uninhibitedly into no-holds-barred, orgiastic delight.• And this was one of the no-holds-barred variety. 