pocket the difference

Translations
положить разницу в карман
When they gave me too much change, I decided to pocket the difference.
Когда мне дали слишком много сдачи, я решил положить разницу в карман.
Definitions
To secretly keep the extra money remaining after a transaction, especially when one is supposed to return it or account for it; to take the surplus for oneself, often dishonestly.