
Not on your life!
Not in a million years! / Over my dead body! / Not for all the tea in China / Not for the world / No way!

Neanche morto! 
Neanche per idea! / Neanche per sogno! / Non se ne parla neanche! / Neanche a pensarci!
Not in a million years! / Over my dead body! / Not for all the tea in China / Not for the world / No way!

Neanche morto! 
Neanche per idea! / Neanche per sogno! / Non se ne parla neanche! / Neanche a pensarci!
Meanings
Absolutely not!
Examples
When he drives, he's a loose cannon. I would never get on his car - not in a million years!
Quando guida รจ un pericolo ambulante. Non salirei in macchina con lui neanche morto!
Go bungee jumping? Not on your life!
Andare a fare bungee jumping? Neanche morto!
Invite your old flames to our wedding? Not on your life, I won't!
Fossi matta! Non se ne parla neanche di invitare le tue vecchie fiamme al nostro matrimonio