Definition of gobsmacked
chiefly British, informal
: overwhelmed with wonder, surprise, or shock : astounded Several minutes later I touch the bottom, pleased to discover that Louise—despite all her experience exploring caves elsewhere in the world—is as gobsmacked as I am. "This place is huge, and daylit," she says, her face glazed with awe.— Gregory Crouch Thus, when the cell-phone video surfaced, fashion insiders were so gobsmacked that to this day they'll tell you where they were when they first heard about it.— Ingrid Sischy
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Time Traveler for gobsmacked
The first known use of gobsmacked was in 1956
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