hostage to fortune idiom
将来可能会引起麻烦的言行;冒险行为;冒险言论
an action or statement that could create problems for you later
The prime minister was extremely cautious, saying nothing inflammatory and giving no hostages to fortune. 首相极为谨慎，不说任何具有煽动性和可能在将来引起麻烦的话。