Buzzkill

The Buzzkill is a special kill featured in 'Call of Duty: Modern Warfare 3, Call of Duty: Black Ops, Call of Duty: Black Ops II,Call of Duty: Ghosts and Call of Duty: Advanced Warfare. 'It is recieved by killing an opponent that needs one more kill to earn a killstreak. This rewards you with an additonal 100 XP along with the kill XP itself.