pinky promise - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

pinky promise (plural pinky promises)

1. (informal) A promise made by entwining one's pinky finger with another person's.

   Synonym: pinky swear

pinky promise (third-person singular simple present pinky promises, present participle pinky promising, simple past and past participle pinky promised)

1. (informal) To make such a promise.

   • 2024 August 31, “Blind date: ‘I made him pinky promise to say nice things about me’”, in The Guardian‎^[1], →ISSN:

     Most awkward moment?
     When I made him pinky promise to say nice things about me in his review.