From Longman Dictionary of Contemporary Englishbeggars can’t be choosersbeggars can’t be choosersACCEPTused to say that, when you have no money or no power to choose, you have to accept whatever you are given → beggar
Examples from the Corpus
beggars can’t be choosers• It would be nice to have a suit with a better fit, but as they say, beggars can't be choosers. 