高攀不上

gāopānbùshàng
to be unworthy to associate with (sb of higher social status)

CEDICT

能力或地位较低，故无法与身分地位较高的人交往或联姻。

重編國語辭典

Entry Composition

1 高攀 gāopān
  1. social climbing
  2. to claim connections with people in higher social class
2 不上 bùshàng
  1. (verbal complement) unable to
  2. to not go up; to not ascend
  3. unable to