1 definition by Larry the Robster
Someone who is winning in a game of billiards. Then this person executes a shitty shot and knocks in the 8 ball in before his/her last ball and thereby loses the game like a fucking idiot and looks like a douche in front of your girlfriend.
Steve: Fuck man I was about to win a shit load of cash from this nigga but I knocked in the 8 ball before the 2.
Kyle: You dumbass, your such a Vacco.
Kyle: You dumbass, your such a Vacco.
by Larry the Robster February 12, 2011