
Not on your life
Strong Refusal
Use it to express a very strong or emphatic refusal or rejection of a suggestion.

"Would you like to try insects for dinner?" "Not on your life!"
Emotional Emphasis
The phrase adds dramatic effect and shows you have strong feelings about not doing something.

"Are you considering taking that risky job?" "Not on your life!"
Informal Setting
It is casual and used more commonly in spoken English or informal writing, like text messages.

"Can I borrow your car for the road trip?" "Not on your life, it's brand new!"
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