monkey patch
technique in which a computer program extends or modifies supporting system software locally, affecting only the running instance of the program
en-GB/ˈmʌŋkɪ ˈpæt͡ʃ/
en-US/ˈmʌŋki ˈpæt͡ʃ/
technique in which a computer program extends or modifies supporting system software locally, affecting only the running instance of the program