In "Fear and Loathing in Las Vegas," Johnny Depp plays Raoul Duke, the cynical, hedonistic fictional persona of author Hunter S. Thompson. The popularity of the movie, particularly the initial car and hotel scenes, have led many people to want to create a Raoul Duke costume. Fortunately this costume consists of regular clothing, so a few trips to local charity shops should provide you with everything you need.
Research the look of the character through movie footage and photographs.
Obtain a white floppy fishing cap. Duke's hat in the movie had a green interior, so cut a ring of felt that matches the brim and attach it to the underside with fabric glue.
Obtain a pair of sunglasses. They should have thin, golden wire rims and large amber lenses.
Obtain a Hawaiian shirt. In the movie, Duke wears a dark brown shirt with gold flowers and leaves. This may be difficult to find in a charity shop, but you might have luck with online retailers. This shirt will be by far the hardest part of the costume to acquire.
Obtain light khaki trousers and white tennis shoes.
Finish the costume with a cigarette holder, a dark leather wristband with silver knobs for your right wrist and a watch with a leather band for your left wrist.
Just as important as the costume is the character, so watch the movie a few times to really get how the character acts.