Amiga... I pinky promise I will answer your question :)))) http://s1.favim.com/orig/22/friendship-pinky-promise-Favim.com-209922.jpg Pinky because you use your pinky fingers (as seen in the picture) to make the promise by crossing them and saying Pinky promise. Then it's a promise you cannot break. It's a promise from heart. Promise is for something that you will do and I guess the Pinky swear is for something that you did or something happened and you want someone else to believe you, so you pinky swear it was like that. Shaimaa... I pinky swear I answered your question! Do you believe me? You pinky promise? :)))

it means to boil water under a dragon's breath hehehehehehehe :) Honest :) (and she's my friend before you start)

I live in Chicago and its not really used in things like news, politics,and etc.Its really just something little kids say when they promise something.Rayofsunshine-san's answer and example is a very good one.

It's just a childish way to ask someone to promise something. Like "Do you promise that you wont lie?" "Yes." "Pinky swear?"