The Collaborative International Dictionary
Unbone
Unbone \Un*bone"\, v. t. [1st pref. un- + bone.]
To deprive of bones, as meat; to bone.
To twist about, as if boneless. [R.]
--Milton.
Wiktionary
unbone
vb. 1 To deprive of bones, as meat; to bone. 2 (context obsolete English) To twist about, as if boneless.