wallace presentation 

A variation on the "middle finger" obscene gesture. The wrist is cocked at a 90 degree angle and only the middle finger is extended straight in the air. Generally considered to be a more elegant way to express "<screw> you".

Steve and Mike gave Andy the Wallace Presentation when Andy asked them to pick up the tab.

wallace presentation by Shames October 11, 2015

Wallace presentation 

A more elegant and dramatic version of giving "the bird" / middle finger. Possibly Scottish in origin. The wrist is cocked at a 90 degree angle, palm facing up, and the middle finger is raised straight in the air.

William showed those English bastards the Wallace Presentation at Stirling Bridge

Wallace presentation by Shames October 29, 2015