flummoxy

From flummox +‎ -y.

flummoxy (not comparable)

1. (informal) flummoxed
   • 2011, Tom Sharpe, Porterhouse Blue: (Porterhouse Blue Series 1)

     Bursar come in to dinner all flushed and flummoxy and the Dean's got them high spots on his cheeks he gets when his gander's up and the Tutor don't eat his soup.