up on the screen

Where mental images one puts while masterbating

Phil: " I'd like to fuck that waitress wouldn't you?"
Slick: " I already did this morning by putting her up on the screen".

up on the screen

Pictorial fantasies one has when masterbating.

Cliff: " Did you catch a glimpse of that chick in advanced Chen?"
Skinny: " Weh - I already had her up on the screen".