Green’s Dictionary of Slang

flusticate v.

[SE fluster]

to confuse.

[UK] ‘Nights At Sea’ in Bentley’s Misc. Nov. 613: I own I was a bit flusticated.
[US]W.T. Porter Big Bear of Arkansas (1847) 98: Being sorter flusticated like, thinkin of that skrape, last time I was there [...] I didn’t notis perticlar where I sot.