in one's cups

in (one's) cups

Drunk. When you're in your cups, foolish ideas have a peculiar tendency of sounding like excellent ones. He called to apologize the following morning, claiming that he had been in his cups when he made those rude remarks.
See also: cup
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

in one's cups

Drunk, as in You can't believe anything he says when he's in his cups. [Early 1600s]
See also: cup
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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