- rotgut
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1. n. strong or inferior liquor, especially whisky. (Folksy.)□ Where is that jug of rotgut you used to keep around here?□ The old man nearly went blind drinking all that rotgut.2. mod. [of liquor] strong or fiery. D You’ve got to stop drinking that rotgut liquor and think of your health.□ I won’t pay for this rotgut whisky. Give me something better.3. n. weak or otherwise inferior beer.□ I need a can of beer, and you give me this rotgut?□ She can afford something better, but she drinks nothing but cheap rotgut.
Dictionary of American slang and colloquial expressions. 2015.