1. ADJ If you describe someone as good-for-nothing, you think that they are lazy or irresponsible. 一無是處的; 懶惰的[ADJ n]

...a good-for-nothing fourteen-year-old son who barely knows how to read and count. ...十四歲的兒子一無是處，連認(rèn)字和數(shù)數(shù)都不甚了了。

2. N-COUNT Good-for-nothing is also a noun. 廢物; 懶人

...lazy good-for-nothings. ...懶惰的廢物。