1.cut off the head of a story:
To interrupt someone in the middle of what he/she is talking.
▹용례:
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민준이는 무엇이 생각난 듯 내 말머리를 자르고 자신의 이야기를 들어 달라고 양해를 구했다.
Min-jun cut off my horse's head as if he had thought of something and asked for his understanding to listen to his story.