out of the blue

Adj.	1.	out of the blue - not anticipated; "unanticipated and disconcerting lines of development"- H.W.Glidden; "unforeseen circumstances"; "a virtue unlooked-for in people so full of energy"; "like a bolt out of the blue" Synonyms: unanticipated, unforeseen, unlooked-for
Adv.	1.	out of the blue - in a way that was not expected; "her brother showed up at the wedding out of the blue" Synonyms: unexpectedly

unexpectedly