The Collaborative International Dictionary of English v.0.48:
Skimble-scamble \Skim"ble-scam`ble\, a. [A reduplication of
scamble.]
Rambling; disorderly; unconnected. [Colloq.]
[1913 Webster]
Such a deal of skimble-scamble stuff. --Shak.
[1913 Webster]