Meaning of yuè yù:
yuè yù
越狱
Verb
to break out of prison; to jailbreak (an iOS device etc)
Nà míng qiúfàn jìhuà yuèyù.
那名囚犯计划越狱。
The prisoner is planning to break out of prison.
Yǒu rén chénggōng yuèyù le tāmen de shǒujī.
有人成功越狱了他们的手机。
Someone successfully jailbroke their phone.