0 so surprised that you cannot speak:
He was completely gobsmacked when he won the award.
Would-be speakers falter, as if gobsmacked by the accumulation of tragic atrocities.
It is now clear that the chairman was gobsmacked because he saw the figures which we produced.
They were gobsmacked by the nasty feeling that the political situation was slipping away.
I am, to use a tactful word, "gobsmacked" at hearing that a public interest immunity has taken place in relation to that decision.
We were gobsmacked to discover later that he was not one of the instructors, but one of those undergoing temporary incarceration.
They were—to use the vernacular—gobsmacked.
I'm gobsmacked, it absolutely blew me away.
Boyle was absolutely gobsmacked by the strength of this reaction.