Gentlemen's Agreement
noun
しんしきょうてい
紳士 （しんし） Gentleman
協定 （きょうてい、not on WK） Arrangement, Pact, Agreement
紳士協定 （しんしきょうてい） Gentlemen's Agreement
Gentlemen's Agreement: an arrangement or understanding which is based upon the trust of both or all parties, rather than being legally binding.