Bite off more than one can chew - take on too much; try to do too much
💬 Porywać się na coś przerastającego własne możliwości, wziąć za dużo na swoje barki
Examples:
She bit off more than she can chew when she agreed to write the entire 100 page report by Friday.
I bit off more than I could chew when I volunteered to manage three teams.