To Ejaculate (Skeet, cum) on someones face (preferances aside) therfore making a masterpeice on the face(canvas)
Person1: Hey nick did you fucksara last night at the party?
Person2: Yeah dude i gave her a Picasso
Person1: Must have been a "masterpiece"
both: Laughing
The Picasso is a sex position for those who are creative, A Picasso occurs when a guy fucks a girl in the ass ( or two guys) and pulls out his shit covered dick and proceeds to smear the shit all over the girls face.
dude 1: dude you will never guess what i did to veronica!