Will you be able to drop in on us for a chat this evening?
If you've got time, you really should drop in on Winnie the Pooh at Hundred Acre Wood, and have a quick bounce with Tigger.
It's improper to drop in on him so casually.
Be sure to drop in on me when you can spare a moment.
If I had a time machine I'd visit Marilyn Monroe in her prime or drop in on Galileo as he turned his telescope to the heavens.
I'll drop in on you when I have time.
More than half of visitors drop in on the page because they've heard about it from friends.
From early morning our neighbours would drop in one by one to have their bath.
When I was in Paris last week, I decided to drop in on Andreas Schleicher, the programme's architect, to get his views on PISA and Shanghai's education system.
Will you drop in on us tomorrow evening for a talk?
Let's drop in on Nick when we're in Bristol, shall we?
I thought I'd drop in on you while I was passing.
In the evening the frequenters of the house drop in one by one.
We know that God is not an absent God. He does not just drop in on us every now and then, but he is with us all the time.