All in all just horrible, nut up and invest your money on Ales, I.P.A.s, Stouts, or Craft beer.
Person 2: "Sorry bro all I've got is the left over can of piss from my younger brother's party from last night."
Person 1: ".. Never mind."
Used to describe a useless person because what good is a "can of piss" to anybody.
you can expand this further by saying: you're some can of monkey piss, donkey piss or even whale piss.
Kevin: You're some can of piss, i tells ya.