A sosumi is sort of the opposite of a guilty pleasure, something you don't care for that you are supposed to like. In the words of Gene Weingarten, the word's inventor: "A sosumi occurs when you just don't like someone everyone else thinks is great. For me, an example is Jimi Hendrix. Another, Chris Rock. Another, Monet. Another, The Bee Gees." Chatological Humor, 31 January 2006.
Weingarten is a humor writer at the Washington Post, known for giving Dave Barry his first job. "Pearls Before Breakfast" won the 2008 Pulitzer Prize for Feature Writing. Another favorite is "The Problem With the French ... is that they have no word for rapprochement."
I like to include things as well as people: foods, pastimes, bands. My sosumis include soup, professional sports, Kurt Vonnegut, and eggplant. What are yours?