6x164 - Late Show with David Letterman

Tonight's secret word (""emetic"") is now sponsored by a lawn-watering device called ""Hosie Cow""; Biff stands outside holding a popsicle in one hand and a Creamsicle® in the other, determining which will melt first (the popsicle); Dave chats with Nancy Mace, the first female graduate of The Citadel.