When things become bottle-necked due to multiple fuck-ups. A severe clusterfuck
The 18-wheeler filled with nuke waste jackknifed on the Seymour Butts Highway, spilling radioactive waste into the sewage system, polluting a local pond and playground, and creating a serious clusterius fornecatus.
Polite replacement term for clusterfuck. When speaking in certain social situations, a speaker may feel the necessity to dramatize the futility of events, but decorum prevents. By utilizing clusterflop, the gravity of the event is emphasized without resorting to profanity