banana slug


Definition of banana slug

  1. :  any of a genus (Ariolimax) of large slugs native to moist forests of western North America that have a long, fusiform body and are sometimes bright yellow in color with brown or black spots … on a pile of redwood stumps by the side of the road, we discovered banana slugs, curled-up balls of bright-yellow ooze that slowly expand to full banana size, seven inches or more, as they glide their slimy way around. — Tamar Lewin, New York Times, 18 Aug. 1996 Banana slugs prefer to graze on wild plants, fallen leaves or, in rare cases, dead animals. — Scott McCredie, Smithsonian, February 1989

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!


First Known Use of banana slug


Seen and Heard

What made you want to look up banana slug? Please tell us where you read or heard it (including the quote, if possible).


to criticize severely

Get Word of the Day daily email!