A taste of their own medicine is treatment as unpleasant as what they gave others. Give him a taste of their own medicine.
It is satisfying to say and rarely improves anybody's behaviour. A taste of their own medicine assumes the person will recognise it, which they usually do not.
1phrasea taste of their own medicineTreatment as unpleasant as what they gave others.
“Being kept waiting was a taste of their own medicine at last.”
a taste of their own medicine is a phrase.
Practised in Idioms