shackle joint noun2 •A joint held together by a shackle or clevis and a bolt.The screw 22, which actuates the rod 19 of the piston, passes through the screw 23, and is jointed to the end of the rod 19 by a shackle joint — 1818 •A joint formed by a bony ring passing through a hole in a bone, as at the bases of spines in some fishes. formsshackle joints