blues

*blues 

1. sadness; a mood of depression. (*Typically: get ~; have ~.) You'll have to excuse Bill. He's getting the blues thinking about Jane. I get the blues every time I hear that song.

2. a traditional style of popular music characterized by lyrics expressing hardship, lost love, etc. Buddy had been singing the blues ever since the Depression.

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the baby blues

a feeling of sadness that some women experience after they have given birth to a baby According to this article, as many as 60% of women suffer from the baby blues.

See cry like a baby, throw the baby out with the bath water, wet the baby's head

See also: baby

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sing the blues

to complain Computer programmers are singing the blues because business is bad and no one is hiring.

Etymology: based on the type of music called the blues (a musical form in which songs often are about difficulties or bad luck)

See also: sing