DCHP-1 Online
prairie oyster † 
1 a raw egg swallowed whole or drunk in vinegar, brandy, etc.
- 1923 What would be good for him? he meditated, confusedly. A "prairie oyster" ? . . . He made and gulped down the concoction shuddering . . . That egg had seen better days!
2 Figurative use.
- 1952 I thought the world was my oyster, but it proved to be a prairie oyster.
- 1923 What would be good for him? he meditated, confusedly. A "prairie oyster" ? . . . He made and gulped down the concoction shuddering . . . That egg had seen better days!