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

Watch: Billie Eilish releases 'ilomilo' visualiser.

Billie Eilish has shared a video for 'ilomilo', from her 'When We All Fall Asleep, Where Do We Go?' debut album, which features some dimly lit deep-sea creatures.

Watch the visualiser below...