Mine would have to be Chanel 9 Neus from The Fast Show...90s UK sketch show with Paul Whitehouse. The whole segment cracks me up every time.. they had one each episode. It's done so well, and all without breaking character.heth-eth-eth-eth, meth-eth-eth, peth-eth-eth... Pi pis na.. boutros boutros gali
Links to my favourites: https://youtu.be/ctaszjeaDK0?si=L459P0C_nCGiUnDy