five o’clock shadow
noun/ˌfaɪv əˌklɒk ˈʃædəʊ/
/ˌfaɪv əˌklɑːk ˈʃædəʊ/
(also 5 o'clock shadow)
[singular]- the dark colour that appears on the chin and sides of a man's face when the hair has grown a little during the day since he shaved in the morning
（早上刮脸后下午又长出的）胡须楂儿