The act of removing your shirt at a concert and waving it above your head in a circular motion, like a helicopters main blades. Can be done as an individual or along with the audience.

Popularised by the Alternative, "Ragga metal" band Skindred and their frontman, Benji Webbe, both of whom hail from Newport, South Wales.

when you're hungover as shit after a spending a night drunk as a skunk