An idiom meaning there is little or no difference between two things; 'six of one, half a dozen of the other.' Often implies both options are equally bad or unremarkable.
あの二人の仕事ぶりは五十歩百歩で、どちらがいいとは言えない。
Their performances are much the same — six of one, half a dozen of the other — so you can't say which is better.
安い材料を使っても高い材料を使っても品質は五十歩百歩だ。
Whether you use cheap materials or expensive ones, the quality is about the same.
意見が違うけど、結局は五十歩百歩だから大きな議論にする必要はない。
We have different opinions, but in the end it's six of one and half a dozen of the other, so there's no need to blow it up into a major debate.