Definition of "boneless"

The packers were always originating such schemes—they had what they called "boneless hams," which were all the odds and ends of pork stuffed into casings.

1905, Upton Sinclair, chapter XIV, in The Jungle, New York, N.Y.: Doubleday, Page & Company, published 26 February 1906

I'm scared, I'm just boneless with fright.

1916, P. G. Wodehouse, chapter 18, in Uneasy Money

I remember, when I was a child, being taken to the celebrated Barnum's circus, which contained an exhibition of freaks and monstrosities, but the exhibit [...] which I most desired to see was the one described as "The Boneless Wonder." My parents judged that the spectacle would be too revolting and demoralizing for my youthful eyes, and I have waited fifty years to see the boneless wonder sitting on the Treasury Bench.

1931, Winston Churchill, House of Commons, 13 May

Had the Green consortium made a straight bid, boneless fund managers would easily have outvoted private investors.

2006 November 11, Graham Searjeant, “Loyalty pays off for M&S shareholders”, in The Times, London

In his final years he [John Ogdon] gave an interview to an American journalist who noticed that "his handshake is a boneless fadeaway["].

2014 May 11, Ivan Hewett, “Piano Man: a Life of John Ogdon by Charles Beauclerk, review: A new biography of the great British pianist whose own genius destroyed him ”, in The Daily Telegraph (Review)‎