1)Lavender Town Syndrome ("""""too bad""""" it doesn't exist, I just like the idea of an illness related to Pokemon)
2)Gout: I've liked it since I played Jurassic Park: Operation Genesis when I was a kid, because I thought about a camarasaurus with a swollen foot. It also sounds funny in Italian, "gotta" (at least to me)
3)Tourette Syndrome: I found a video on youtube about this so funny that my father thinks it's actually fake; however, Wikipedia has a page about it (maybe only that video is fake)
This could be good material for a question in that test...