Sales have dropped off in recent months.
And when the Boy dropped off to sleep, the Rabbit would snuggle down close under his little warm chin and dream, with the Boy's hands clasped close round him all night long.
I'll drop off your books when I see you tonight.
The leaves were slowly dropping off the tree.
Greenbaum didn't dramatically drop off the radar as soon as that song peaked, but kept slogging away for five years with diminishing returns.
... But the drop off from the 95th to the 80th percent ...