Uh Oh…..oh oh oh
Oxymoron
Military intelligence
Ooky
The general mien of the Addams family.
Oodleplex
The state of being confused by many things at once.
Obfuscate
To (not) answer a simple question in the manner of a politician.
Obstreporous
Wot you looking at?
Oddsock
A truly irritating wardrobe affectation.
Orzo
Sorry, but I was expecting an aniseed-flavoured Greek aperitif.
Onomatopeia
To manifest suddenly on a carpet
Oodles
Loadsamoney
Oompah
One of two items deliberately concealed beneath your pullover.
the only deadhead in the hameau 
Ha! These are funny. Thanks for joining in again this week.