Moe Jaffe (October 23, 1901 – December 2, 1972) was a songwriter and bandleader who composed more than 250 songs. He is best known for six: "Collegiate" (which was played by Chico Marx in the movie "Horse Feathers"), "The Gypsy in My Soul", "If I Had My Life to Live Over", "If You Are But a Dream", "Bell Bottom Trousers", and "I'm My Own Grandpa".