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.
"I'm gunna sink sum beer's and chill ou watching the footy."
"I sunk a 700ml Bottle of Bundaberg O.P."
"Make sure you don't sink the 8-ball when your trying that 'hit and hope' shit."