Philly Cheese Fry Share definition Flag During a blowjob, when a penis is covered with both cum and pee. Josh: Dude, I gave Mary a Philly Cheese Fry last night. Philly Cheese Fry by InsanelySausey June 6, 2010 0 0 Get merch Get the Philly Cheese Fry mug. Buy Now — $32.95 See more merch