Green’s Dictionary of Slang

cleaver n.2

[cleave v.]

a promiscuous woman.

[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: Cleave [sic] One that will cleave; used of a forward or wanton woman.
[UK]Grose Classical Dict. of the Vulgar Tongue (3rd edn) n.p.: Cleaver. One that will cleave; used of a forward or wanton woman.
[UK]Lex. Balatronicum [as cit. 1796].
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.