dumps

Nearly synonymous with down in the mouth.

dumps
Down in the dumps; low-spirited, melancholy: jocularly said to be derived from Dumpos, a king of Egy...

Dictionary of The Vulgar Tongue by Francis Grose
dumps
Sorrow; melancholy; sadness.--Johnson. We say of a person who is dull or sad, 'He has the dumps,' or...

Dictionary of American Words And Phrases by John Russell Bartlett.