From Longman Dictionary of Contemporary Englishit’s a free countryit’s a free countryBritish English used, usually humorously, to say that you are or should be allowed to do something, after someone has said that you should not do itIt’s a free country. You can’t stop me. →free
Examples from the Corpus
it’s a free country• "You can't say things like that!" "I can say whatever I want - it's a free country."