不上不下

bùshàngbùxià
  1. between a rock and a hard place
  2. describes an awkward situation where one does not know what to do
  3. in a bind; in a pickle
  4. inappropriate

Wiktionary

Entry Composition

1 不上 bùshàng
  1. (verbal complement) unable to
  2. to not go up; to not ascend
  3. unable to
2 不下 bùxià to be not less than (a certain quantity, amount etc)