Resembling the sound or behavior of a clucking hen; making clucking sounds, or in Australian slang, feeling maternal or broody.
From cluck + -y (an adjective-forming suffix from Old English -ig). The formation is straightforward descriptive construction, with the Australian meaning developing in the 20th century.
The Australian slang 'clucky' for maternal instinct is brilliantly metaphorical—it compares a woman's desire for babies to a hen brooding over eggs, showing how language captures deep human experiences through animal behavior.
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