prairie oyster
Concise Oxford English Dictionary © 2008 Oxford University Press:
prairie oyster
▶noun
- 1 a drink made with a raw egg and seasoning, drunk as a cure for a hangover.
- 2 (prairie oysters) chiefly N. Amer. the testicles of a calf cooked and served as food.
'prairie oyster' also found in these Oxford entries:

