a gibbering wreck (=someone who is very shocked or frightened)
受惊的人,被吓坏的人
Examples from the Corpus
gibber• Something else Hugh saw nearly made him gibber.• More voices began to call and gibber from other houses, and everywhere he saw signs that the familiar world was disintegrating.• He was gibbering with rage.
a gibbering wreck• The great anti-Establishment provocateur of the Sixties now reduced to a gibbering wreck?