coup de main - noun
kü-də-ˈmaⁿ
Definition of coup de main : an attack that achieves complete surprise.

Taylor Swift announces new album 'The Tortured Poets Department'.

Taylor Swift surprised fans with the announcement of a new album, 'The Tortured Poets Department', during her acceptance speech for Best Pop Vocal Album at this year's Grammys.

Swift's new album will be released on April 19th.