drink like a fish

drink like a fish idiom
Consume large amounts of alcoholic beverages, as in He always drinks like a fish at holiday dinners. The expression, first recorded in the mid-1600s, alludes to the way fish obtain oxygen, which causes them to be open-mouthed and appear to be constantly drinking.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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