shit stirrer
noun[C]
mainlyUKoffensiveuk/ˈʃɪt ˌstɜː.rər/us/ˈʃɪt ˌstɝː.ɚ/someone who makestroublefor otherpeople,especiallyby makingknownfactsthat they wouldprefertokeepsecret:
（尤指泄漏别人秘密的）麻烦制造者，搅屎棍He didn't need totellher that - he's just ashitstirrer.他不必告诉她的——他可真是爱搅和。