fluster fluster /ˈflʌstɝ/

noun

1. A disposition that is confused or nervous and upset  ( fluster , perturbation )
   a disposition that is confused or nervous and upset
   

verb

1. () Be flustered; behave in a confused manner  ( fluster )
   be flustered; behave in a confused manner
   
2. Cause to be nervous or upset  ( fluster )
   cause to be nervous or upset