What is "choppiest"

Usage examples of "choppiest".

Finally I got to the surface and grabbed hold of somebody's roof beam, which was bobbing around like a toothpick on the choppiest, craziest sea you ever heard of.

In a few seconds they were racing forward at some fifteen miles an hour and rising and falling on the strange, sharp, perpendicular waves of Malacandra with a jerk y motion quite unlike that of the choppiest sea that Ransom had ever met on Earth.