It bothers me that funner is not considered the valid comparative form of fun. Why? Because saying more fun is boring; that is to say, the phrase more fun is grammatically hypocritical. It is far more fun to say funner than more fun. Shouldn't a word be what it describes? Besides, I see no phonological reason why funner shouldn't be the valid form. It doesn't break any rules. Long live 'funner'!
When I was in 4th grade, I had to write a report about an animal of my choice. I looked at the back of our dictionary and this was the last word, so I chose to write my report about the Zyzzyva. Fond memories!
This is one of my absolute favorite words because it is so slithery fun to say. It is one of the rare English words with a cluster of four consonant phones /ˈsɪksθs/. As you speak that word-final consonant cluster, your tongue darts out and back in quickly as if it realized it shouldn't have stepped out in the first place. :)