Wiktionary
double double
n. 1 (context Canadian informal English) coffee with the equivalent of two creamers and two packets of sugar. 2 (context basketball English) The achievement of a two-digit number of any two of points scored, assists, rebounds, blocks, or steals in a single game. 3 (context US English) A double cheeseburger with cheese on each burger (i.e., double cheese).