Definition of "Nimbusile"
The winning definition goes to commenter in Rudy Moore who came up with the following explanation:
nimbusile (adj.) - Someone with his head so far up his ass, it's in the clouds.
Congratulations, Rudy! Email me your contacts and I'll send you the winning bumper sticker post haste.
P.S. Honorable mention goes to commenter "Dave." Don't give up, brother!