半老徐娘

bàn lǎo xú niáng

middle-aged but still attractive woman

lady of a certain age

半

bàn

half

老

lǎo

prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity

徐

xú

slowly

娘

niáng

variant of 娘[niang2]