Definition
to unexpectedly attack or harshly criticize an individual out of the blue
突然襲擊（或批評）某人
During the meeting, John turned on Mary with a sudden outburst, shocking everyone.
在會議中，John突然對Mary大發雷霆，震驚了所有人。
Many fans expected his campaign to continue, but he unexpectedly turned on the media with harsh criticisms.
許多粉絲本以為他的競選活動會繼續，但他出乎意料地對媒體進行了嚴厲批評。
She had always been his supporter, but during that argument, he turned on her opinions with harsh words.
她一直支持他，但在那次爭論中，他卻用尖銳的言語抨擊了她的觀點。