The fine art of wiping your cock on the curtains of your victim, before leaving. To have sexual intercourse and then wipe off one's penis with the (sometimes) fancy curtains draping the windows.
I was banging this gal, and after I came I foozled off on her curtains and left.
To cum after masturbation onto someone's window curtains. Usually the curtains are very elegant and long, likely of a nice material. Often refered to as a "posh wank onto the curtains". French origins.
I was at a nice house last night and I had a foozle upstairs!