Karl Pilkington is a British comedian and broadcaster who became widely known through his work with Ricky Gervais and Stephen Merchant, including The Ricky Gervais Show and An Idiot Abroad. His blunt, literal way of speaking turned everyday complaints into cult comedy, and short clips of his voice have long circulated on soundboards and social media. This one-word dismissal fits that style perfectly, so creators keep using it as a quick, recognisable shorthand for disbelief without needing any context from the original show.