good-for-nothing

1. ADJ If you describe someone as good-for-nothing, you think that they are lazy or irresponsible. 一无是处的; 懒惰的[ADJ n]

...a good-for-nothing fourteen-year-old son who barely knows how to read and count. ...十四岁的儿子一无是处，连认字和数数都不甚了了。

2. N-COUNT Good-for-nothing is also a noun. 废物; 懒人

...lazy good-for-nothings. ...懒惰的废物。