choppy
1. adjective
1
(of railway track) uneven, producing a rough ride US, 1975.
2
in autombile racing, describing abrupt movements in vertical wheel displacement US, 1980.
3
(of a temperature chart) uneven. Hospital nurses' use UK, 1961
2. noun
a choppy wave. Surfers' use, reported by Barry Prentice, 1984 AUSTRALIA, 1984