‘Feel blue’ or `in a blue funk’

‘Feel blue’ means feeling sad or depressed.
And that’s what the expression `in a blue funk’ also means.
For example, Tara has been in a blue funk ever since she lost her job. * “There’s no point in going into a blue funk whenever our team loses. Our overpaid underachievers seldom win.

 Source: ‘Know Your English’ ( The Hindu) -April 02, 2007