blue-devil

plural noun

1. low spirits; depression.
2. delirium tremens.

noun Slang.

1. a blue capsule or tablet containing the barbiturate amobarbital or its derivative.

noun Slang.

1. blue heaven.

pl n

1. a fit of depression or melancholy
2. an attack of delirium tremens

n.

1. A blue capsule or tablet containing barbiturate amobarbital or its sodium derivative.
2. A feeling of depression; despondency.