Meaning

1 senses
  1. (idiomatic, slang, uncountable, vulgar)Something exceedingly rare or, more likely, nonexistent.

Origin

From the expression rare as rocking horse shit, with the joke being that rocking horses do

From the expression rare as rocking horse shit, with the joke being that rocking horses do not produce feces.

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rocking horse shit — meaning, examples, forms, synonyms | Krumeto