drop off
(to decrease, become less)
- The number of children in the school has dropped off this year.
- Sales have dropped off since last year.
informal (to take someone to a place by car, especially while you are driving somewhere else)
- Can you drop the kids off at daycare on your way to work?
- Let me drop you off on my way home. [Opposite: pick up]
informal (to fall asleep, especially without intending to)
- The kid laid down and dropped off to sleep.
- I dropped off and missed my flight.