どんぐりの背比べ

Meaning

1. expn
   having very little difference between one another; being much of a muchness; being more or less the same; height comparison among acorns
2. expn
   pointless competition (between two equally unimpressive parties); pissing contest

Example sentences

• こういう流れになると結局、どんぐりの背比べになる。

  Once things start going this way, in the end they'll all be much of a muchness.

• どんぐりの背比べだよ。

  They are all alike.