Galifianakis, the comic gift in the first, keeps on giving. Just not as generously. Still, what humor there is to be found in "Part III" is due to that innocent idiocy he embodies in the 42-year-old man-child of Alan.

For the most part, though, the Wolfpack has grown meaner over time. Cooper's main job, except for one cool stunt atop Caesars Palace, is to look good, drop F-bombs and scowl. Helms' role is to remain angry and insecure about the whole dentist-versus-doctor thing.

Chow, if possible, is more bitter than ever. If old friends have to be sacrificed to keep Marshall's fortune, so be it.

Come to think of it, Chow is actually an apt metaphor for the movie — indescribably irritating and only in it for the money.

betsy.sharkey@latimes.com

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'The Hangover Part III'

MPAA rating: R for pervasive language including sexual references, some violence and drug content, brief graphic nudity

Running time: 1 hour, 40 minutes

Playing: In general release