Every time I hear this throwaway phrase uttered by some sycophantic cunt on the box I can feel my blood pressure raise. Usually used in conjunction with either Cheryl "caterwauling frog diddling" Cole, Stephen "anal fissure" Fry or James "mines a quadruple decker beef, egg and sausage sarnie" Corden.
The basic rule of thumb is: National treasure= Over exposed, talentless bollock boil.