drink like a fish
to regularly drink a lot of alcohol

[TahlilGaran] Dictionary of Contemporary English ▲

drink like a fish
[informal]
to regularly drink a lot of alcohol.
Harriet had two bottles of wine with her meal - that girl drinks like a fish!

[TahlilGaran] English Idioms Dictionary ▲

drink like a fish
to drink alcohol to excessive amounts
The man drank like a fish at the party and he had to go home by taxi.

[TahlilGaran] English Idioms Dictionary ▲

drink like a fish
v. phr. To drink (alcoholic beverages) in great quantities; to be addicted to alcohol.
John is a nice guy but, unfortunately, he drinks like a fish.

[TahlilGaran] English Idioms Dictionary ▲