“The Beach Bum” (* out of four) was a plotless mess about a carefree stoner (Matthew McConaughey) who ambles through life in Florida and sees no reason to change or take life seriously. Thus, there’s virtually no reason to take the movie seriously either. Yet another pointless mix of sex, drugs, and debauchery from director Harmony Korine who in better days wrote the classic “Kids”. McConaughey is pretty one-note but doesn’t have a whole lot to work with here and a top-drawer supporting cast including Jimmy Buffett, Snoop Dogg, and Martin Lawrence are completely wasted.