To visit a place that is north of one's current location. I do live in Florida now, but I'd love to drop up and visit you in New York sometime.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
drop up (some place)
to come for a visit to a place that is relatively higher or in the north. Drop up and see us sometime. Please drop up when you can.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.