flourish

i read, i think, it has been many many years ago, in the journals of george plimpton, the word flourish.  according to plimpton flourish was victorian slang for having a quickie, such as the lord of the manor might write in his journal, 'flossie & i had a flourish on the settee this afternoon.'  

mighty fine diction!  but i have yet to find any dictionary to support plimpton's claim that flourish was slang for fast, loose, & happy sex.  a quick search on the interwebs tells me that flourish was victorian shorthand for a showy, flashy, ostentatious display of manners & style.  

gotta trust the sources, right.  i dunno.  i think flourish for a quickie is a subtle & elegant word for sex.  why not.  english is not short on slang words for doing the deed.  be they be seemingly innocuous or downright gutter talk.  even so poetry is made from such language.