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

Watch: The Avengers x 'Mean Tweets'.

The latest edition of Jimmy Kimmel's 'Mean Tweets' segment is particularly hilarious this time round, featuring none other than a lot of the core cast of 'Avengers: Infinity War'.

Watch the clip below...