Oxymorons II

Such as... 

Civil War

"Now, then ..." 

Synthetic natural gas 

Passive aggression 

Taped live 

Clearly misunderstood 

Peace force 

Extinct Life 

Temporary tax increase 

Computer jock 

Plastic glasses 

Terribly pleased 

Computer security 

Political science 

Tight slacks 

Definite maybe 

Pretty ugly 

Twelve-ounce pound cake 

Diet ice cream 

Rap music 

Working vacation 

Jumbo Shrimp 

Microsoft Works