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。