As a Verb or Adjective: 1. To stop talking (signing or speech) abruptly. English = shut up. 2. To talk rudely or abruptly to someone, often ending by telling them to shut up; to snap at someone. Interactive: 1. Used alone to tell your addressee to stop talking (speech or signing) immediately, especially if they are about to say something which should not be overseen by others. 2. Acceptable among friends, but quite abrupt, if not rude, to strangers. English = 'Shut up!'