Senses
大叔 uncle (father's younger brother)
one's father's eldest younger brother
大叔 steward
an archaic polite term of address for another family's servant
大叔 uncle (polite address)
a polite term of address for a man about the same age as one's father
大叔 middle-aged man (colloquial)
(colloquial) a middle-aged man, often implying he is attractive, sophisticated, or mature; (informal) any middle-aged man