“Slippy” was coined by the early OpenStreetMap community (specifically Steve Coast, I think) to mean draggable. It was in contrast with the previous generation

“Slippy” was coined by the early OpenStreetMap community (specifically Steve Coast, I think) to mean draggable. It was in contrast with the previous generation of webmaps which had buttons for panning N/S/E/W, each of which would trigger a new page load with a new set of tiles.