Other forms: continental drifts
Continental drift is the theory that the continents slowly and gradually moved to take on their current form. Continental drift can also be used in a jokey way to describe things that move really slowly.
Continental drift is a translation of the German Kontinentalverschiebung (say that five times fast). In 1912, the German scientist Alfred Wegener came up with the theory of continental drift, which is what it sounds like — the theory that over time, the continents drifted into the positions they’re in now. The continental drift theory is now a part of plate tectonics — the idea that there was once a giant continent that broke up into the ones we know today.