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bluestocking [bluestocking 词源字典]: bluestocking: [18] The term bluestocking ‘female intellectual’ derives from the gatherings held at the houses of fashionable mid-18th- century hostesses to discuss literary and related topics. It became the custom at these not to put on full formal dress, which for gentlemen included black silk stockings. One habitué in particular, Mr Benjamin Stillingfleet, used to wear greyish worsted stockings, conventionally called ‘blue’.

This lack of decorum was looked on with scorn in some quarters, and Admiral Boscawan dubbed the participants the ‘Blue Stocking Society’. Women who attended their highbrow meetings thus became known as ‘Blue Stocking Ladies’ (even though it was a man who had worn the stockings), and towards the end of the century this was abbreviated to simply bluestockings.
[bluestocking etymology, bluestocking origin, 英语词源]
conventional (adj.): late 15c., "of the nature of an agreement," from Late Latin conventionalis "pertaining to convention or agreement," from Latin conventionem (see convention). Meaning "of the nature of a convention" is from 1812, now rare; "established by social convention" is from 1761; that of "following tradition" is from 1831; that of "non-nuclear" is from 1955. Realted: Conventionality; conventionally.
swing (v.): Old English swingan "beat, strike; scourge, flog; to rush, fling oneself" (strong verb, past tense swang, past participle swungen), from Proto-Germanic *swingan (cognates: Old Saxon, Old High German swingan, Old Frisian swinga, German schwingen "to swing, swingle, oscillate"), from PIE *sweng(w)- "to swing, turn, toss" (perhaps Germanic only).

The meaning "move freely back and forth" is first recorded 1540s. Transitive sense "cause to oscillate" is from 1550s. Sense of "bring about, make happen" is from 1934. Sense of "engage in promiscuous sex" is from 1964; earlier, more generally, "enjoy oneself unconventionally" (1957). Related: Swung; swinging. Swing-voter "independent who often determines the outcome of an election" is from 1966.
unconventional (adj.): 1832, from un- (1) "not" + conventional (adj.). "A 19 cent. epithet for a certain type of affectation." [Weekley] Related: Unconventionally.