subs. (colloquial).Low spirits; the DUMPS or HUMP (q.v.). [Properly parts of the ocean near the Equator abounding in calms and light, baffling winds.]
1865. M. BROWNE, in the The Argosy, I., 36. An Apology for the Nerves. All I say is, do not let us have any abuse of the nerves. Do not confound nervousness with the megrims, or the DOLDRUMS, or any other complaint. Do not confound it with cowardice or ill-temper.
1883. PAYN, The Canons Ward, ch. xi. She treated all subjects in the same light way; from aversion to serious thoughts of any kind, which she stigmatised generally as the DOLDRUMS.