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

Watch: Fall Out Boy perform new song 'Expensive Mistakes' live.

| by Shahlin Graves

Currently on their M A  N   I    A tour (in support of their forthcoming album of the same name), Fall Out Boy have debuted a new song, 'Expensive Mistakes', road-testing it for delighted American fans.

Watch fan-filmed footage of the new song below...