BUTT SERIOUSLY By ORLA HEALY June 27, 2005 PEEK-A-BOO g-strings - divine! Runaway bra-straps - sexy! Lumps of puckered lard cascading over the chafing waistbands of skin-tight skirts - absolutely fabulous! Whether it's thunder thighs bursting out of keister-cupping shorts, blubbery bellies drooping over belt lines or deflated bosoms languishing under form-fitting tops - New York is boldly redefining its celebrated status as the nation's fashion capital. The carb-friendly look that's spreading like a pair of child-bearing hips across the city lends itself to creative interpretation, as you'll see in our investigation on the following pages. Never mind that pesky...