The success of comedy ultimately depends on a movie's ability to find a core audience, but if most moviegoers have any kind of stable brain function, they'll make sure they don't become part of the warped, dimwitted circle of viewers who have been targeted for "Slackers," the latest in a never-ending series of teen gross-out comedies executed with the emphasis on perverted sexual antics. Lowering the bar of bad taste to a level achieved previously only by Tom Green with "Freddy Got Fingered," the movie is nasty, reprehensible, shallow and lazy, pulling off its material in a manner that results not in laughs, but in groans of agony. And the movie's not even bright enough to at least see the potential of a sense of humor amidst all its meandering. Its only interest is in grossing us out, simply for the sake of being gross.