Definition of "choppy"

Commander Birch was a trifle uneasy when he found there was more than a popple on the sea; it was, in fact, distinctly choppy.

1928, Lawrence R. Bourne, chapter 17, in Well Tackled!‎

Safely navigating choppy waters has allowed FirstGroup to pay its first interim dividend for almost a decade, and only its second since payments restarted in August.

2022 November 30, “Network News: First pays out interim dividend after reporting £37m pre-tax profit”, in RAIL, number 971, page 24