From Longman Dictionary of Contemporary Englishlock horns (with somebody)lock horns (with somebody)ARGUEto argue or fight with someone The band have now locked horns with their record company over the album. → lock
Examples from the Corpus
lock horns (with somebody)• In fact, the feuding agencies were about to lock horns and starve over the first two dams on their priority lists.• Louis throws a chair at Victor; they lock horns and wrestle.• The big beasts of medical ethics have been locking horns, the rationalists against the religious as usual.• Who had once locked horns with superpowers. 