Akademik

blues
State of depression or sadness. [slang, fr. blue devils]
- postpartum b. mood disturbance (including insomnia, weepiness, depression, anxiety, and irritability) experienced by up to 50% of women the first week postpartum; apparently precipitated by progesterone withdrawal.

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blues 'blüz n pl but sing or pl in constr low spirits: MELANCHOLY
blue 'blü adj

Medical dictionary. 2011.