The phrase "able to drop in" is grammatically correct and can be used in written English.
It means having the ability or opportunity to visit or stop by a certain place at any time. Example: "I'll be passing by your house later, so I'll be able to drop in for a quick chat." In this example, the speaker is expressing their ability to visit the person's house without prior notice.
"With the sort of government we've got now [Edward Heath's Conservatives] the chances, of course, of ever being able to drop in are correspondingly fewer.
"To be able to drop in and create a link to make [the money] a circular thing is a big part of it," the managing director of Waste Source said.
I've made a nuisance of myself in a variety of radio stations over the last couple of years, but I always hoped that for my final Radio Daze column I'd be able to drop in on the station that first made me fall in love with radio.
Although it's unclear whether people's holograms would really be able to drop in on one another, my fantasy of relaxing in Montana while cutting a swath through Gotham would have a price: millions of disembodied Gothamites cutting a swath through Montana.
It seems Ryan wants to be able to drop in on the 2016 race when it's convenient for him.
His family will now be able to drop in".
That ball just kind of ran back, down and in on me, and I was able to drop it in".
The competition for savers' money is so stiff that there is little chance banks will be able to drop rates in the next 12 months, he says.
It was my personal celebration of being alive, being strong, being able to drop down in a split at age 27, even if my thighs have cellulite.
I did not go to Harvard or M.I.T., but I have met many people who did, and they have all told similar tales of a land where you read for your life: knowing the facts and being able to drop them constantly in conversation (with commentary, no less) are prerequisites for coolness (for coolness!).
Eventually, Henige hopes that lazier caffeine addicts will be able to drop their cups in special Reduce Reuse Grow bins, ready for pickup and planting.
