IPA: //ˈflæb.ər.ˌɡæs.tɪd//
KK: /ˈflæbərˌɡæstɪd/
Very surprised or shocked by something unexpected.
She was flabbergasted when she won the lottery.
To be extremely surprised or shocked by something unexpected.
She was flabbergasted when she won the lottery.
Past: flabbergasted
Past Participle: flabbergasted
Flabbergasted is believed to originate from a combination of the dialectal English word 'flabber' (meaning to flap or to move about) and 'gasted' (from 'aghast', meaning struck with terror or amazement). The word describes a state of being so astonished that one is almost rendered speechless or flabbergasted.
Imagine being so surprised that you feel like you're 'flapping' ('flabber') in shock, which helps you remember that 'flabbergasted' means to be utterly astonished.
No commonly confused words.