A slang term for an obesewoman receiving oral sex. While you're chowing down her taco, her nasty fat rolls are more than likely resting on the top of your head, sagging down on either side like a big, floppy sombrero.
(At a party)
Craig: "Have you guys seen TJ? I'm supposed to be giving him a ride home."
Nate: "Dude, he is drunk out of his mind. I just saw him walk upstairs with this massive heffer. I'm guessing that she's going to try to give him the ol' floppy sombrero."
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi