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3. like a bolt out of the blue

like a bolt out of the blue

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like a bolt out of the blue

 and like a bolt from the blue

Fig. suddenly and without warning. (Alludes to a bolt of lightning coming out of a clear blue sky.) The news came to us like a bolt from the blue. Like a bolt out of the blue, the boss came and fired us all.

See also: blue, bolt, like, of, out