Little House on the Prairie - Modern Times in Walnut Grove
He Loves Me, He Loves Me Not (1980): Nellie tells Percival that he is short….uses words with the word “short” in it to insult him. She used the word "shortening." However, shortening was not invented until 1911. (Wikipedia) This episode states that Laura is 16. She was born in 1867. So the year in the episode should be 1883.
Crisco is shortening.
[Editor's note - although Crisco is indeed shortening, and is mentioned in the Wikipedia entry mentioned, it does not say that this was the first shortening product. Crisco's own website's timeline for 1911 mentions the introduction of Crisco, and says "Crisco, the first solidified shortening product made entirely of vegetable oil, was the result of hydrogenation, a new process that produced shortening that would stay in solid form year-round, regardless of temperature. " - so although it was the first one made entirely of vegetable oil, it obviously wasn't the first shortening product of all time!]