I'm just kidding, you little knucklehead.

我是说着玩脑。

He knew the teacher had heard the insulting taunts of his thoughtless schoolmates.

他知道老师已经听到了那些脑同学们对他侮辱和嘲笑了。

Ms. Doom and gloom and her sister tiny dancer.

不高兴小妹妹和她脑姐姐。

Of course, it is only the foolhardy who succumb to the temptation to live, temporarily at least, beyond their means, and such people would no doubt manage to do so even without credit cards.

当然，只有脑人才经不起诱惑去过入不敷出日子（至少暂时如此），其实，即使有信用卡，种人也无疑会样做。