From Longman Dictionary of Contemporary Englishstraight manˈstraight man noun [countable] BOAPan entertainer who works with a comedian, providing him or her with opportunities to make jokes
Examples from the Corpus
straight man• A straight man and a good fisherman.• What could work better with a free spirit than a stuffy, disapproving straight man?• You soon realise that you're expected to play straight man, but it's hard to complain.• You want a dollar from me, he said, playing straight man.-I do.• A good responsible, straight man. 