Despite my earlier reservations about Bobby and Peter Farrelly, they’re progressively winning me over, partly because they keep getting better; this 1998 comedy often had me in stitches. Their gross-out humor is basically sweet tempered, for all its tweaking of PC attitudes, and though this film looks slapdash, its script (by the Farrellys, Ed Decter, and John J. Strauss) is surprisingly well put together. The victimized hero (Ben Stiller) nurtures a 13-year infatuation with the title heroine (Cameron Diaz), who moved away to Miami soon after high school in Rhode Island. He hires a shady detective (Matt Dillon) to track her down, and the detective falls in love with her himself. This movie’s unforced feeling for lower-middle-class disaffection is worthy at times of W.C. Fields, and there are some worst-case-scenario sequences involving a prom date, a dog, and jerking off that are convulsively hilarious. With Lee Evans and Chris Elliott. 119 min. (JR)