you could cut the atmosphere with a knife idiom
（局面）剑拔弩张，一触即发
used to describe a situation in which everyone is feeling very angry or nervous and you feel that something unpleasant could soon happen
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。