Wiktionary
mountain oysters
n. (plural of mountain oyster English)
Usage examples of "mountain oysters".
The testicles were carefully tossed into a bucket, for rocky mountain oysters were featured at every roundup.
Throw in some sweetbreads, throw in some mountain oysters and some psst clams!
He ain't your friend, he'd make mountain oysters outa your nuts in a minute.
Conan kindled a small, almost smokeless fire and roasted the stag's kidneys and mountain oysters and slices of its liver over the flames.