Bedeutung von “drop off” — Learner’s Dictionary

drop off

phrasal verb with drop us uk /drɒp/ verb present participle dropping, past tense and past participle dropped
SLEEP informal

to start to sleep:

She dropped off in front of the TV.

If the amount, number, or quality of something drops off, it becomes less:

The demand for mobile phones shows no signs of dropping off.

(Definition von “drop off” aus dem Cambridge Learner's Dictionary © Cambridge University Press)