Definition:

dumpster fire:

noun
variants: or less commonly Dumpster fire
Definition of dumpster fire

USinformal
an utterly calamitous or mismanaged situation or occurrence DISASTER

“Reese and McAdoo take the fall for what has been a dumpster fire of a season, one which has them at 2-10 on the season, and in line for one of the top two picks in the 2018 NFL Draft.”— James KratchSo while “2017 has been, by many measures, a complete dumpster fire of a year, New Yorkers can at the very least take refuge in the fact that their city is becoming an even safer place to live.”— Clayton Guse
First Known Use of dumpster fire
2008, in the meaning defined above

https://www.merriam-webster.com/dictionary/dumpster%20fire