Gob-smacked

[gob-smakt] /ˈgɒbˌsmækt/

adjective, Chiefly British Informal.
1.
utterly astounded; astonished.
/ˈɡɒbˌsmækt/
adjective
1.
(Brit, slang) astounded; astonished
adjective

See gobsmacked
adjective

flabbergasted, astounded, shocked; also written gob-smacked
Word Origin

from gob ‘mouth’ + smacked ‘clapping hand over in surprise’
adj.

by 1990, U.K. slang, from gob “mouth” + past participle of smack.

adjective

Extremely surprised: gobsmacked at the nomination

[1980s+; fr gob,”mouth,”and smacked, ”hit, struck,” the theatrical gesture of clapping a hand over the mouth as a gesture of extreme surprise]

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