dol·drums 
(dōldrəmz′, dôl-, dŏl-)
(dōldrəmz′, dôl-, dŏl-)pl.n. (used with a sing. or pl. verb)
1.
a. A period of stagnation or slump.
b. A period of depression or unhappy listlessness.
2.
a. A region of the ocean near the equator, characterized by calms, light winds, or squalls.
b. The weather conditions characteristic of these regions of the ocean.
[From obsolete doldrum, dullard, alteration (influenced by TANTRUM) of Middle English dold, past participle of dullen, to dull, from dul, dull; see DULL.]