What words or phrases can you come up with that stump Google entirely? Quotes are allowed, as are plus signs, but you can’t restrict it to a single site unless the result’s really funny.
I’ll kick it off with a potential band name in the genre of the “Butthole Surfers” or “Anal Cunt”: "Ku Klux Kenyan"
(Yes, Google will swiftly index this thread, turning these things into “words and phrases that return precisely one result on Google”. It’s the circle of random Internet crap.)