drink like a fish 酗酒；狂饮；痛饮

【例句】
I used to drink like a fish and get drunk all the time.
我以前喝酒很猛，而且每次都喝醉。

My father used to drink like a fish, but now he drinks very little to keep healthy.
我爸爸以前经常喝酒，但现在他为了健康，很少喝酒了。