While the story is a bit silly, it plays well with the cast it's given, all of whom are either comedy veterans like Eric Idle and Andrea Martin to the likes of Robert Downey Jr and Ralph Macchio, who plays the world's biggest scum ever seen in this movie
The movie centers around two gay siblings who are forced into producing an heir within one year of their father's death. But it's really the lengths they go to trying to get this done and the freaks they meet along the way that really make this flick a lost treasure. I won't go so far as to call it a classic, but since that fateful night at 3AM, I've watched this movie over and over (thankfully, I was able to get copy it as I've never found a real version of it anywhere since).
If you want to watch something silly with actors you know and/or love, don't have a problem with story lines that center around gay people and aren't interested in too coherent of a story, or if you just want to see Ralph Macchio play something completely different for once, and lord above knows he's the reason I love this movie so much (something I can't say too often), watch this movie.