Found 2 items, similar to mackerel sky.
English → English (WordNet) Definition: mackerel sky mackerel sky n : a sky filled with rows of cirrocumulus or small altocumulus clouds
English → English (gcide) Definition: mackerel sky mackerel sky \mackerel sky\ n. A sky filled with rows of cirrocumulus or small altocumulus clouds. [WordNet 1.5]