knock yourself out

US /nɑk jərˈsɛlf aʊt/
UK /nɑk jərˈsɛlf aʊt/
"knock yourself out" picture
1.

silakan, buatlah sesuka hati

used to tell someone that they can do something if they want to, even if you think it is not a good idea or will not be successful

:
You want to try to fix the car yourself? Sure, knock yourself out!
Awak nak cuba baiki kereta sendiri? Tentu, silakan!
If you think you can finish all that work by yourself, knock yourself out.
Jika anda fikir anda boleh selesaikan semua kerja itu sendiri, silakan.