TELEVISION It's not pretty, but 'Animal House' defines a generation BY GLEN GARVIN ggarvin@herald.com LOS ANGELES -- Dean Wormer: Who dumped a whole truckload of Fizzies into the swim meet? Who delivered the medical school cadavers to the alumni dinner? Every Halloween the trees are filled with underwear; every spring the toilets explode. Marmalard: You're talking about Delta, sir. Nobody had ever seen anything like it. It was rebellious, it was anarchic, it was gross. It had kids getting wasted and puking and being promiscuous, sometimes all at once. Its heroes were drunks and slobs and Peeping Toms; its villains...