Nothing doing interjection spoken language
Used as a refusal of a request
A: Will you lend me your pen? B: Nothing doing! Do you remember you broke my pen last time?
I asked her to join us but she said, "Nothing doing".
This interjection dates back to the late 1800s.
If you fall for someone's trick the first time then they are at fault.
Are you going to mess with me again? Fool me once, shame on you; fool me twice, shame on me.