Dropping off means taking someone or something to a place and leaving it there briefly. It can also mean a drop in numbers or activity, or starting to fall asleep.
There is nothing like it for morale to be reminded that the years are passing-ever more quickly-and that bits are dropping off the ancient frame. But it is nice to be remembered at all. Prince Philip, Duke of Edinburgh
Wait for those unguarded moments. Relax the mood and, like the child dropping off to sleep, the subject often reveals his truest self. Barbara Walters
She had lost all our memories for ever, and it was as though by dying she had robbed me of part of myself. I was losing my individuality. It was the first stage of my own death, the memories dropping off like gangrened limbs. Graham Greene
It wasn't until I started to do 'Poison River' that the readership started falling. 'Poison River' started out very slowly and simply, but then it got really dense and complicated. I don't know, I think the readers just got fed up or burned out. They started dropping off. Gilberto Hernandez
I think it's extremely unlikely that the European Union will fracture with nations dropping off the edge. John Major
I will not eat cakes or cookies or food. I will be thin, thin, pure. I will be pure and empty. Weight dropping off. Ninety-nine... ninety-five... ninety-two... ninety. Just one more to eighty-nine. Where does it go? Where in the universe does it go? Francesca Lia Block