fall off
US /fɔːl ɔːf/
UK /fɔːl ɔːf/

1.
menurun, merosot
to decrease in quantity or quality; to decline
:
•
Sales tend to fall off during the winter months.
Penjualan cenderung menurun selama bulan-bulan musim dingin.
•
His performance has started to fall off recently.
Performanya mulai menurun belakangan ini.