Definition of be struck all of a heap in US English:

be struck all of a heap

phrase

informal
  • Be extremely disconcerted.

    • ‘The British spectators, who had read about these cars and only partly believed what they had read, were struck all of a heap.’
    • ‘Some bright character, possibly strolling along a towpath one day, must have been struck all of a heap by the idea that has so infuriatingly escaped me in spite of the frequent strolls along towpaths that I take myself.’
    • ‘He was struck all of a heap, and never seemed to know what ailed him.’
    • ‘Chamberlain went to see Hitler, and afterwards wrote to his sister that he heard from Hitler himself, and it was confirmed by others who were with him, that he was struck all of a heap, and exclaimed ‘I can't possibly let a man of his age come all this way; I must go to London’.’
    • ‘The King was struck all of a heap by the sight, and knew not what had befallen him.’
    • ‘He had been wounded three times and used to say every morning: ‘They'd be struck all of a heap, those Boches, if they could see me now!’’