fall off
US /fɔːl ɔːf/
UK /fɔːl ɔːf/

1.
diminuire, calare
to decrease in quantity or quality; to decline
:
•
Sales tend to fall off during the winter months.
Le vendite tendono a diminuire durante i mesi invernali.
•
His performance has started to fall off recently.
La sua performance ha iniziato a diminuire di recente.