He's a lost Claus. A politically correct West Village YMCA has fired Ol' St. Nick in favor of Frosty. Kids who once thrilled at sitting on Santa's lap at the 14th Street McBurney YMCA's wildly popular annual holiday luncheon will now suffer the icy embrace of a talking snowman and his sidekick, an anonymous penguin, at today's event. Forget about bringing a list or checking it twice -- Frosty doesn't take gift requests, and doesn't care if you're naughty or nice. YMCA officials, who say they are in the midst of "rebranding" the Young Men's Christian Association to "The Y,"...