agent provocateur
noun /ˌæʒɒ̃ prəˌvɒkəˈtɜː(r)/
/ˌɑːʒɑ̃ː prəʊˌvɑːkəˈtɜːr/
(also provocateur)
(plural agents provocateurs
(from French) /ˌæʒɒ̃ prəˌvɒkəˈtɜː(r)/
/ˌɑːʒɑ̃ː prəʊˌvɑːkəˈtɜːr/
)- a person who is employed to encourage people in political groups to do something illegal so that they can be arrested
（受雇于政府，怂恿某些政治团体人士犯法以便将之逮捕的）密探，坐探 词源late 19th cent.: French, literally ‘provocative agent’.