A mythical "perfect job" where you produce nothing measurable, are not closely observed, and can spend all day masturbating, or playing Minesweeper, or writing the Great American Novel, or whatever your bag is. A shortening of sinecure?
A method of inhaling the contents of a bucket bong where, once the mouth has been placed over the end of the bottle, the bottle is pushed down into the water to compress the smoke and get a faster and easier hit.