Seattle's Nacho Picasso is proudly obnoxious and delightfully dumb. A drugged-out, degenerate party animal, he's like a rap version of the Mean Jeans. Like those loveable jester-goons, Nacho is everything but self-serious with jokey songs that place the party above the ego. Both have written about coke (and the girls who sniff it all) and weed (the Jeans' "Stoned 2 the Bone" vs. Nacho's Stoned and Dethroned mixtape). There are differences, of course: Nacho is a laidback, scraped-voiced emcee whose sparse tunes are just as at home in a strip club as at an after-party. But like the Jeans, Nacho is smarter than he lets on. And while he might be in the business of killing brain cells, he's got a few to spare. ANDREW R. TONRY