1. fluster -- (be flustered; behave in a confused manner)
2. fluster -- (cause to be nervous or upset)
fluster can be used as a noun
1. perturbation, fluster -- (a disposition that is confused or nervous and upset)
1.
Why, they'd steal the very--why, goodness sakes, you can guess what kind of a fluster I was in by the time midnight come last night. - from Adventures of Huckleberry Finn, Complete by Mark Twain (Samuel Clemens)