Yippe Ki Yay – Gilded Balloon at the Museum
The phrase “Yippe Ki Yay” originated in the 19th-century Western United States, making its way into the 1988 film Die Hard entirely within the context of old Westerns: it closes a scene in which Alan Rickman's Hans Gruber accuses Bruce Willis's John McClane of having seen to many John Wayne films and the latter answers he always preferred Roy Rogers.
Though the show adds the words “the Die Hard parody” in brackets at the end of its title just to be sure, I wouldn't imagine there is a soul on Earth that went into a show named Yippe Ki Yay looking for a musical about the Old West, such is the hold Die Hard now has over the phrase. It has since been said in every sequel (and a poster) without even an attempt at another cowboy reference, the franchise itself providing its context now.
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