despondent (or sullen or grumpy or ill-tempered mood) n.pl. mulligrubs.

[This word, which is a noun because it is referring to the mood itself, is usually preceded by “the”, as in “have the mulligrubs” or “having a case of the mulligrubs.] Living with a depressed person is hard.  … “Hey Juliet,” I’d say. “Are the mulligrubs any better today?”  [or “Looks like you’re in the doldrums again, Juliet” [or] “Got the mopes today, honey?” (Amity Gaige, The Sea Wife, Knopf [2020], p. 142.

This word can also be a synonym for being in a cranky, dejected, sad, despairing, unhappy, irritable or depressed mood.