rainbow runner

noun
  1. a streamlined, cigar-shaped swift jack, Elagatis bipinnulata, of warm seas, having a blue back, light-colored abdomen, and blue-bordered yellow stripes on its sides: a food and game fish.

Origin of rainbow runner

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018