Green’s Dictionary of Slang

jiglets n.

[ety. unknown; ? fig. use of SE, giblets, i.e. generic use of one’s innards as one’s whole being]

(US) oneself, as in his jiglets.

1888

Boston Globe 4 Mar. n.p.: Ain’t his jiglets pretty near ready to see de rat, Jummy [F&H].