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Phrases & SayingsEveryday lifeRhyming slang

Noah's ark

Rhyming slang: historically 'nark' (informer), and later in Australia 'shark'.

In a sentence

In this historical or contextual use, “Noah's ark” means rhyming slang: historically 'nark' (informer), and later in Australia 'shark'.

Where it came from

The Australian National Dictionary Centre records the nark sense from the late nineteenth century and the Australian shark sense from the 1930s.

Initial era
1850–1899
Where used
Australian use; no narrower regional pattern established

Sources