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

Watch: Billie Eilish debut 'Bitches Broken Hearts' live for the first time.

While performing at Alt 105.3’s BFD 2018 back in May, Billie Eilish performed her song ‘Bitches Broken Hearts’ live for the first time ever.

Watch a video of the performance below…