fall off
US /fɔːl ɔːf/
UK /fɔːl ɔːf/

1.
merosot, berkurangan
to decrease in quantity or quality; to decline
:
•
Sales tend to fall off during the winter months.
Jualan cenderung merosot semasa bulan-bulan musim sejuk.
•
His performance has started to fall off recently.
Prestasinya mula merosot baru-baru ini.