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to bet one's life
01
to express strongly and confidently that something is undoubtedly true or will certainly happen
![to [bet] {one's} (life|boots|bottom dollar) definition and meaning](https://cdn.langeek.co/photo/46670/original/?type=jpeg "to [bet] {one's} (life|boots|bottom dollar) definition and meaning")
Idiom
Informal
What is the origin of the idiom "bet one's life" and when to use it?
The idiom "bet one's life" is an idiomatic expression that is used to show a high degree of confidence or certainty in a particular outcome or belief. The origin of the phrase is not precisely known, but it likely derives from gambling or betting activities where individuals would wager their most valuable possessions, such as their life, boots, or the last dollar, emphasizing the significance of the bet.
Examples
I'd bet my life he knew about the plan before the meeting.
