Based on the Yiddish version, bobkes to mean nothing, absolutely nothing at all. 2.) Tiny shit balls, specifically like the fecal droppings of a goat. Bupkis mit kaduchas, means "shivering shit balls."
1.) A handsome, strapping man with swagger. 2.) An un-licensed cab driver. 3.) A foreman. 4.) Irish. A man of questionable and eccentric habits. Like that of a rake. 5.) Irish. A young boy or lad. 6.) Canadian. Derog. "A buck" is also a highly offensive racial slur for a native male.