The word 'oxymoron' takes its roots from the Greek oxus (sharp) 
and moros (dull): a sharp dullness or foolish wisdom.  Here are
some self-explanatory oxymorons.  

LadyHawke
*~*~*~*~*~*
 
 The Most Popular Oxymorons

Act naturally
Advanced BASIC
Airline food
Almost exactly
Alone together
Black light 
Bricked-up window
British fashion
Business ethics
Butt head
California culture
Childproof
Christian Scientists
Civil war
Clearly misunderstood
Computer jock
Computer security
Criminal justice 
Crisis management
Death benefits
Definite maybe
Diet ice cream
Divorce court
Down escalator   
Dry wine 
Elementary calculus 
Ethical government    
Exact estimate
Extra time    (A LadyHawke's favorite)
Fast idle
Found missing
Freezer burn
Fresh frozen  
Genuine imitation
Good grief
Gourmet pizza 
Government organization
Great depression 
Guest host    
Half full
Hard pillow 
Hopelessly optimistic   
Hospital food    
Industrial park
Invisible ink    
Irate patient 
Jumbo Shrimp
Junk food 
Lean pork   
Legally drunk
Little giant  
Living dead
Mandatory option 
Microsoft Works
Mild abrasive 
Military intelligence
Minor disaster   
New classic
Non-stop flight    
Now, then . . .
Old news 
Original copy    
Partially completed
Passive aggression
Peace force
Peacekeeper missile   
Plastic glasses
Political science
Pretty ugly
Rap music
Resident alien
Restless sleep   
Rock music    
Rubber bone  
Safe sex
Same difference
Sanitary landfill
Scheduled play
Silent scream
Small crowd
Soft rock
Software documentation
Standard deviation    
Sure bet 
Sweet sorrow
Synthetic natural gas
Taped live
Temporary tax increase
Terribly pleased
Tight slacks
Turbo Diesel  
Twelve-ounce pound cake
Unacceptable solution 
Work party    
Working vacation