Chiefly British Informal. a situation, especially in politics, in which poor judgment results in disorder or chaos with potentially disastrous results

Link to present incidents:
Brexit is followed by fighting in the Conservative Party over who will be the next prime minister, but also the Labour Party is in a row, which has provoked a Guardian journalist to come up with this sentence:“ It makes the Tory omnishambles era look like some low-stakes, high-competence utopia.“