Jackson Pollock (1912-1956) was an American painter of the abstract expressionist movement. He is best known for his 'drip' paintings, which were composed between 1947 and 1950. He would drip and splatter liquid paint on to large canvasses laid on the floor of his Long Island studio, a technique which has become known as action painting. Rumour has it that Pollock would urinate on his paintings before delivering them to art dealers, if he didn't like the dealer in question. He is also famous for relieving himself into a fireplace at one of Peggy Guggenheim's elegant cocktail parties.