The act of sex between two gay men, one skinny and the other extremely large, in which the large man is on top of the skinny man, flattening him in the process.
Guy 1: Hey, did you see Billy last night?
Guy 2: No I didn't, he was getting pancaked by Fat Frankie.
Guy 1: Did you check under him?
Guy 2: Nah, I prefer Waffles but I know he loves a pancaking!