flabbergasted• The delivery men just left the furniture in my front yard. I was flabbergasted.• I tell you I was flabbergasted and right terrified out of my wits.• Doctors said they were flabbergasted at the decision to close the hospital.• Studioexecutives were flabbergasted at the film's extraordinarysuccess.• He was flabbergasted how it turned out.
Originflabbergasted
(1700-1800) Perhaps from flabby + aghast (= shocked)