reverse-pickpocket

reverse +‎ pickpocket

reverse-pickpocket (third-person singular simple present reverse-pickpockets, present participle reverse-pickpocketing, simple past and past participle reverse-pickpocketed)

1. (transitive) To slip something into someone's pocket or pocketbook, without their knowledge, sometimes as a gesture of generosity.
   • 2001, Gary Smith, Beyond the Game, page 78:

     But when no one's watching he will slip hundreds inside palms and pocketbooks of poor people—reverse-pickpocket them—or bolt out of a car to help someone old hobble across the street.