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not on your life

not on your life

7.8
Say it to show you will never do something
  • idiom
  • Informal
translation icon : ni hablar
  • Not on your life.

And as a scholar, I can tell you my first response was not on your life.

Examples

Synonyms

under no circumstances
vsnot on your life
  • Formal
20 4.2

Says that something must never happen in any situation

is a personal refusal expression rather than a rule or prohibition
in no way, shape, or form
vsnot on your life
3 5.6

It is not true or possible in any way

is used to refuse doing something rather than deny truth or possibility
not for the world
vsnot on your life
  • Informal
1 6.7

To never do something, no matter what happens

is more informal and stronger when refusing something
for all the world
vsnot on your life
1 7.9

Refuse to do something no matter what happens

is framed as a personal refusal rather than a general statement
nothing doing
vsnot on your life
  • Informal
1 8.1

A firm no when someone asks for something

is stronger and absolute covering any circumstance rather than only refusal
first of never
vsnot on your life
  • Informal
9.9

People say this to show that something will not happen

is an absolute refusal asserting it will not happen under any circumstances

How Likely

certain
946 1.0
likely
1.0
possible
1.0
unlikely
487 1.9
not on your life
  • Informal
7.8

Surface Forms

Morphology

not + on + your + life

The negator 'not' plus 'life' gives a plausible inference of 'not during your life' (i.e. never), so part of the meaning is recoverable from the constituents. However the preposition 'on' and the fixed idiomatic function as a strong emphatic negator are non‑literal and not fully predictable from the words alone, so a B1 learner may not reliably derive the exact emphatic sense without prior exposure.

Etymology

Not on your life may come from the strong image of refusing something so completely that you would not do it while you are alive. So today people use it to say 'definitely not' or 'never'.