Bzzzzzzz! No entry found for honorificabilitudinity in the dictionary.

Bzzzzzzz back! http://www.askoxford.com/asktheexperts/faq/aboutwords/longestword "For example, the medieval Latin word honorificabilitudinitas (honourableness) was listed by some old dictionaries in the English form honorificabilitudinity (22 letters), but it has never really been in use."

My all-time favorite poem, Barney McGee by Richard Hovey, uses that word. The poem unfortunately is not available on-line. I am tempted to recite ...

But faldage, if you have any doubt, substitute a variant form, in the phrase honorificabilitudinitatibus earlobes -- and you'll get a tremendous giggle by checking the site which that one hits. Surely you would not dispute that word? [thanks, tsuwm!]