a  taste of one's own medicine
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<abbr style="text-decoration: underline;" title="taste / dose" > taste</abbr>
teɪst
teist
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<i>one's</i>
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medicine
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Definition & Meaning of "a taste of one's own medicine"in English

a taste of one's own medicine
01

a harsh or unpleasant way of treating someone that is almost identical to the manner in which they treated one 

a (taste|dose) of {one's} own medicine definition and meaning
Idiom
Informal

What is the origin of the idiom "a taste of one's own medicine" and when to use it?

The idiom "a taste of one's own medicine" has its origins in a proverb that dates back centuries. The proverb "He that will not hear must feel" is one of its earliest forms and implies that those who refuse to listen to advice or admonishments will eventually experience the consequences of their actions physically or emotionally. It is commonly used in situations where an individual is facing the repercussions of their own behavior, especially if that behavior involved mistreatment, deceit, or harm towards others.

Examples
After ignoring everyone's calls, he got a taste of his own medicine when nobody answered him. 
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