Each character has multiple fatalities that can be performed at the end of the match when you beat your opponent in Mortal Kombat 9 (2011 version) for the PS3 and Xbox 360.
This is the list of all finishers (two fatalities, one babality, and one stage fatality) for Kano.
These can be unlocked and added to your moves list by performing them in either Arcade Mode or Versus Mode.
Check out these complete fatality guides for more finishing moves:
Fatalities and babalities for Mortal Kombat on Xbox 360
Fatalities and babalities for Mortal Kombat on PS3
Kano’s Fatalities & Finishing Moves
Xbox 360
Eat Your Heart Out — Down, Down, Forward, Back, B within sweeping distance
Heartbreak — Back, Down, Back, Forward, X within sweeping distance
Babality — Forward, Forward, Down, Down, A in jumping distance
Stage Fatality — Up, Up, Back, A at close range
PS3
Eat Your Heart Out — Down, Down, Forward, Back, Circle within sweeping distance
Heartbreak — Back, Down, Back, Forward, Square within sweeping distance
Babality — Forward, Forward, Down, Down, X in jumping distance
Stage Fatality — Up, Up, Back, X at close range