Question

What
do you mean by up and down​

Answer 1

Answer:

up and down. phrase. If you move up and down somewhere, you move there repeatedly in one direction and then in the opposite direction

Answer 2

Explanation:

adjective. moving alternately up and down: the up-and-down swing of levers; an up-and-down tune. having an uneven surface: up-and-down countryside. changeable: up-and-down luck. perpendicular or nearly so: a straight up-and-down hillside