To CLUCK,
a Wench's Propension to Male-Conversation, by her romping and playfulness; when they say, The Mort Clucks.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
The Vulgar Tongue originally collected by Grose, 1811.
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).