Definition of "KBO"

So Sunak will try to muddle through, adopting Winston Churchill’s wartime mantra “KBO” (keep buggering on). Ministers insist the picture is not as bleak as the headlines about Tory divisions suggest, noting that the unpalatable tax rises in Jeremy Hunt’s autumn statement were approved by 318 votes to 223.

2022 November 30, Andrew Grice, “Rishi Sunak is trying to govern the ungovernable”, in The Independent‎