wildcat strike
noun [ C ] uk/ˌwaɪld.kæt ˈstraɪk/ us/ˌwaɪld.kæt ˈstraɪk/ (UK also lightning strike)
（事先没有警告的且没有工会支持的）“野猫”式罢工，闪电式罢工
a sudden strike (= act of refusing to work as a protest) without any warning by the workers and often without the official support of the unions