n.愚蠢的人；愚蠢的错误
v.闲混；犯错误；做蠢事；把 ... 弄得一团糟
I told him not to goof around. 我叫他不要游手好闲。
You will never be good students so long as you goof around. 如果你们成天游手好闲，就永远也成不了好学生。
