To put your hand over someones face. Following this, the 'Andy Warholler' usually screams "ANDY WARHOL!!!"
This is a tradition in many rural English East Anglian secondary schools as it originated there on October 26th 2007. It is also used in the act of mating when either gender has a face like a horse, but the body of a godess/god,this covers up the horse face and allows for maximum pleasure.
"Dude! You totally just Andy Warholed Sam"

"Yeah, I know"
by Will. December 1, 2007
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