Although the way its spelled may differ slightly , the notability of the game is shown by the variations on the being referred to in popular culture , examples including Stephen Fry 's The Liar , the German movie Crazy and Skinless 's song `` Scum Cookie '' . Although the terminology may differ slightly , the notability of the game is such that variations on the theme are referred to in popular culture , examples including Stephen Fry 's The Liar , the German movie Crazy , Adam Green 's song `` Mozzarella Swastikas '' , and Skinless 's song `` Scum Cookie '' .