My father looks square in his jacket.

My father looks square in his jacket.

穿着夹克的爸爸看起来古板过时。　

形容词square在这个句子中就相当于：old-fashioned。这里，使用的是这个词一个俚语中常见的含义：（形容一个人）沉闷、刻板保守、守旧落伍（A person who is regarded as dull, rigidly conventional, and out of touch with current trends）。作这个意思讲时，square还可以作为名词，指那些沉闷、刻板保守的人（A plain, boring person; someone who is out of touch with the latest trends）。
例句：
　　Michael is such a square. I've never met anyone so boring.
　　迈克真是古板。我从没见过这么无趣的人。