Is there a word for hangover thirst?

Is there a single word to describe the feeling of thirst/dryness when hungover?

I'm translating a song from Russian and just 'hangover' will probably work, but i'm wondering if there's maybe a slang word for this specifically.

Solution 1:

I’ve often heard the term cotton mouth to describe this phenomena.

The Oxford learner’s dictionary labels this as US informal. An online wellness article indicates that the chief symptom of cotton mouth is "a severely dry mouth” and says that one way to avoid it is by limiting your alcohol intake.

I’m not sure how widely recognizable this term might be outside of the U.S., but it might work well as slang in a song lyric. It even has the same number of syllables as hangover, so it might be an easy fit for you.

Solution 2:

I'm not aware of a single word, a common UK phrase however is to

have a mouth like the bottom of a parrot's cage

I can't find a definition of it as such but there are plenty of examples online where the meaning is clear from context. It conveys both thirst and the way everything tastes vile when you wake up with a hangover. Like the bottom of a parrot's cage because it's dry and covered in...crap.