[ gāo dī bù jiù ]

就：成。高者无力得到，低者又不屑迁就。形容求职或婚姻上的两难处境。

明·冯梦龙《喻世明言》第二十七卷：“因此高低不就，把女儿直挨到一十八岁，尚未许人。”

can't reach the high or accept the low (idiom); not good enough for a high post, but too proud to take a low one