The phrase "Osh Posh!" is an insult of sorts. It is yelled at the end of sex, if the sex was bad. It tells the partner that they are boring or uncomfortable in bed, and they should really work on it. It is not only a one worded phrase used at the end of sex, but can also be used as an adjective.
"John Doe is very osh posh."
by Scocchan September 14, 2010