The raunchy tale of three grown men regressing to their fraternity days -- the unrated version is raunchy-plus, with bonus seconds of bare breasts -- is a well-worn homage to old-school ''SNL''-alum comedies (complete with a ''Stripes''-ish topless K-Y wrestling match and countless ''Animal House'' allusions), and cast with actors who rehash their most practiced personas (Vince Vaughn: smugly manipulative; Will Ferrell: earnestly blank-eyed). In theaters, the spotty outrageousness was never quite as funny as you'd hoped, but when seen at home on your couch, its familiarity makes ''Old School'' just as funny as it needs to be.

