Brass razoo
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Brass razoo is an Australian phrase that was first recorded in soldiers' slang in World War I. It is defined in the Oxford English Dictionary as "a non-existent coin of trivial value".[1] It is commonly used in the expression I haven't got a brass razoo, meaning the speaker is out of money.
Whilst mock coins of 1 Razoo are occasionally produced, no actual monetary unit has ever been so named. Some speculate that the term arises from Egyptian or Indian currency.[citation needed]
Etymologists and lexicographers have disputed and considered theories of the origins of the phrase, but most find no theory satisfactory.[2]