blue ‧ stock ‧ ing /ˈbluːˌstɒkɪŋ $ -ˌstɑː-/ BrE AmE noun [countable] British English
[ Date: 1700-1800 ; Origin: From the 'blue' (actually grey) stockings worn by gentlemen at that time ]
a woman who is more interested in ideas and studying than in parties, men etc – sometimes used to show disapproval