Rauol Duke is an author avatar, and the main character in Fear And Loathing In Las Vegas. He is also featured in other Thompson works in his place. He is cynical, hedonistic, and eccentric, having an extraordinary ability to freak people out at almost every turn.
"We had two bags of grass seventy-five pellets of mescaline, five sheets of high powered blotter acid, a salt shaker half full of cocaine, and a whole galaxy of multi-colored uppers, downers, screamers, laughers... and also a quart of tequila, a quart of rum, a case of Budweiser, a pint of raw ether and two dozen amyls. Not that we needed all that for the trip, but once you get locked into a serious drug collection, the tendency is to push it as far as you can."