a gone coon
slang, obsolete Any person or thing that is in a position of certain death, failure, or ruin. From the image of a raccoon (commonly shortened to "coon") being hunted for its fur. Primarily heard in US. He said his business would be a gone coon if the bank doesn't approve his loan.
a gone coona person or thing in desperate straits or as good as dead. US informal
Coon in these idioms is an informal abbreviation of raccoon . Raccoons were hunted for their fur, and a gone coon was one that had been cornered so that it could not escape.