każdy sobie rzepkę skrobie

Etymology
lit. 'everyone grates their own turnip'; a line spoken by the Councillor's Wife in Act 1 of  by :
 * Wyście sobie, a my sobie. Każden sobie rzepkę skrobie.
 * You unto yourselves, and we unto ourselves. Everyone grates their own turnip.

Proverb

 * 1)  it's every man for himself; everyone cares most about their own business