一人相撲

ひとりずもう【一人相撲･独り相撲】

●その異議申し立ては彼のひとり相撲に終わった. His challenge went unanswered. | Nobody took up his challenge.

●ひとり相撲を取る tilt [be tilting] at windmills.

●ひとり相撲は取れない. It takes two to wrestle [fight, have a fight].