I have heard it (putting in small cyclic inputs) called 'spilling the lift,' which would seem to be a functional description of what's going on. It was explained to me as one way to achieve a smooth touchdown.
..and not a bad way to completely cock up an otherwise ordinary landing!
If you want to achieve a smooth touchdown learn how to fly the machine properly and use your collective. There is a special corner of the VERY HOT place reserved for people who flap their cyclics about. Where do these ideas come from?!
