Phrase derived from the popular
game, Call of Duty 4 in which a team who were previously owned, opt out of the following round in fear of a subsequent defeat. They then
lie saying 'We need to back out (leave current lobby) and get Karl' who is an imaginary player.
The phrase was originated when a group of players left a
game in search of 'Karl'. Ten seconds later they rejoined, accidently, shouting 'Where's Karl?!' amongst laughter.
Use this a sneaky way of leaving a
game without owning up to the fact that your opponents are too good for you.
This phrasing can be used in almost any online FPS
game.