ВЕРТЕТЬСЯ КАК БЕЛКА В КОЛЕСЕ

[v'ert'ettsa kak b'elka v kol'es'e]

To turn like a squirrel in a wheel.

To constantly busy oneself, to toil, to bustle about.

Cf. To be constantly on the go; to run /go around in small circles; to run around like a squirrel in a cage; to be as busy as a bee; to be busy as a bee/beaver.