war cry
noun [ C usually singular ] uk/ˈwɔː ˌkraɪ/ us/ˈwɔːr ˌkraɪ/ (also battle cry)
（作战时的）呐喊，喊杀声
a phrase or word shouted by people as they start to fight, intended to give them the strength and wish to fight harder
figurative The phrase "burn your bra!" was the feminists' war cry of the 1970s. “烧掉你的胸罩！”是20世纪70年代女权主义者的呐喊口号。