goof-off

基本解释

I'll go on the off-chance of seeing her.
我想去一趟，看能不能见到她。
http://www.iciba.com
Billions of dollars of branded blockbuster drugs are due to go off-patent in 2009 and 2010.
价值上万亿美元的名牌药物将在2009年和2010年失去专利保护。
Because cereal bars rarely have more than 2 grams of protein, kids might be better off adding a stick of Go-Gurt!
因为麦片棒的蛋白质含量很少会超过2克，所以最好是给小孩子另加一根Go-Gurt！
bbs.chinadaily.com.cn

Many people now see it as a distinct possibility that several bond insurers will lose their triple-A ratings and go into run-off because of their massive exposures to troubled credit derivatives.
FORBES: Magazine Article
Income tax is one possible target—not least because far more of the benefit of a 10p tax rate would go to the better-off than to the poor, some of whom earn too little to pay tax.
ECONOMIST: The budget
This could result in the creation of a new internal business unit, or could go so far as the creation of a spin-off company.
FORBES: The Castle And The Sandbox - Book Preview

If someone goofs off, they spend their time doing nothing, often when they should be working.