Definition of five o'clock shadow in English English dictionary
A beard growth visible late in the day on a man whose face was clean-shaven in the morning
A very short growth of beard on a man's face who did shave in the morning but whose beard is so strong that it is again visible in the afternoon. - "You have a five o'clock shadow, honey," Irene said, "and we're going to the opera. Why don't you shave again quickly?"