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fish duck

American  

noun

Informal.

  1. merganser.

Etymology

Origin of fish duck

An Americanism dating back to 1855–60

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Knowing a mallard from a merganser has another side: gourmets prefer a corn-fed mallard to the fish duck.

From Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.