feel as if a cat has kittened in (one's) mouth

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feel as if a cat has kittened in (one's) mouth

To feel very hungover (with an awful taste in one's mouth). A: "You don't look so good. How are you feeling after your night of partying?" B: "Ugh, I feel as if a cat has kittened in my mouth." A long night of drinking will leave you feeling as if a cat has kittened in your mouth.
See also: cat, feel, if, kitten, mouth