1. pinky swear - Noun
2. pinky swear - Verb
pinky swear (plural pinky swears)
A promise or oath made ceremonially binding by enjoining the pinkies of two individuals
Synonym: pinky promise
pinky swear (third-person singular simple present pinky swears, present participle pinky swearing, simple past pinky swore, past participle pinky sworn)
(informal) To swear (promise) with the pinky fingers entwined.