I'm partial to
incontinence, myself........sounds so much classier than "Uh, I just peed my pants"
I also like the 'ring' produced by:
Bronchiectasis (except when it occurs, of course)
Sanguineous (when used to describe certain drainage)
Endoscopic retrograde cholangiopancreatography (it took me forever to learn how to run that one all together)
Obstipation (kinda creative, isn't it?)
My LEAST favorite word:
Pus