A contradiction in terms. Contrary to what some people will tell you, from Limerick to Florida, it does NOT mean a stupid ox. Derived instead from the Greek words oxy (sharp) and moros (dull).
Examples of oxymorons:

sunny night
military intelligence
compassionate conservative
ethical landlord
honest politician
open-minded altie
Christian Democrat
to appear invisible
deafening silence
friendly fire
charm offensive
civil war
by Fearman December 03, 2007
Someone who regularly contradicts themself, and looks like an idiot (or, dare I say, a MORON) each time they do so.
"She said she that's not true..."
"What an OXYMORON! Just then she was saying it IS!"
by Jazzo July 07, 2005
Two words that seemingly contradict each other when used together.
(20:38:05) amy: hey, i really am a good girl
by AciDz0r June 28, 2005
A sequence of contradictory words
The posh bit of Leeds
by Zanthos April 13, 2005
An idiot with a gas bottle!
That idiot has a gas bottle! That's the first oxymoron I've seen in a long time!
by Ethan February 16, 2005
A rhetorical figure in which incongruous or contradictory terms are combined. Americans are uncultured morons.
The suggestion from the intelligent american was met by a deafening silence.
Contradiction number one is a joke but not an oxymoron, number two is from the Oxford English Dictionary
by Stultus von Americana September 23, 2003
two words with opposite meanings placed next to each other to mean something new

a combination of contridictory words
I went out to eat with my hoe and she ordered the JUMBO SMRIMP.
by Jess'ca February 21, 2003
a dumb bleached blonde; any Paris Hilton look-alike wannabe; any girl who thinks she need as a boob job and blonde hair
She is thinking of bleaching her hair to look like Paris Hilton: what an oxymoron!
by alex777 August 10, 2007

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