(colloquial) Bewildered shock or surprise; the state or condition of being flabbergasted. / (archaic, colloquial, humorous) The act of confounding or bewildering.

simple past tense and past participle of flabbergast

Appalled, annoyed, exhausted or disgusted. / (euphemistic, rare) Damned.

(countable) An awkward person. / (uncountable) Overwhelming confusion, shock, or surprise.

(transitive) To overwhelm with bewilderment; to amaze, confound, or stun, especially in a ludicrous manner.

Synonym of flabbergast (“overwhelming shock or surprise”)

present participle of flabbergaster

Third-person singular simple present indicative form of flabbergaster

A person, thing, fact or event that is flabbergasting, or that causes extreme shock. / A state of surprise or fear.

(archaic) To perplex or amaze; to shock or frighten