good-for-nothing

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

...a good-for-nothing fourteen-year-old son who barely knows how to read and count. ...十四嵗的兒子一無是処，連認字和數數都不甚了了。

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

...lazy good-for-nothings. ...嬾惰的廢物。