Definition of blue devil in English:

blue devil

noun

informal
  • 1A blue capsule containing a barbiturate.

    • ‘I'd take a blue devil but I have to open tomorrow and I get really bad hangovers from benzos, so I'll just write tomorrow's blog today and catch a "nap" or whatever.’
  • 2blue devilsA feeling of despondency or low spirits.

    • ‘He seems to be suffering from a bad case of the blue devils, and he can be a bit prickly.’
    • ‘Well, they are kindred spirits because they both have a case of the blue devils; both are drowning in their personal woes because love makes you do things you don’t want to do.’
  • 3blue devils

    another term for delirium tremens