The best way to go for this achievement is to try to run over AFK players at the end of the plane drop, specifically if they land in water and there is a nearby boat. This will be the easiest way because very few people will bother with the AFKers in water.
You could try to kill AFKers on land, but typically there is at least a few people to compete with.
(AFK killing is highly luck based)
Other (natural) tips would be to drive on the roadways when far from the next circle as other players will also be looking for a vehicle giving you the best chance for a splat. Another advantageous spot would be in open fields especially on Erangel because enemies won’t have any cover.
Anyway this will take a bit of skill and luck but is quite doable in time. Good luck all.