Pinkie Promise 

It's a special kind of promise. Nopony breaks a Pinkie Promise. 'Cross My Heart, Hope to Fly, Stick a Cupcake in my Eye!' is the pinkie promise.

Alright man I Pinkie Promise, I Cross My Heart, Hope to Fly, Stick a Cupcake in my Eye, that I will tell you tomorrow.

Pinkie Promise by tiger3y3s September 22, 2013

Pinkie promise 

The most sacred promise anyone can give. When broken, you lose your friend forever. The pinkie promise is done by uttering a chant and doing the motions

AJ: you bettar not tell Twi that ah lost her book. Y'all know what happened last time thayt happened.

RD: Pinkie promise. Cross my heart, hope to fly, stick a cupcake in my eye.

RD crosses a hoof over her heart, opened her wings and gave a flap, and put a hoof to her eye.

AJ: thanks, Dash. Ah really don't know what ah'd do without y'all.

RD: no problem, pal.

*later*

RD listened to Twi talk about her new book she lent to AJ. She bit her lip, and opened her mouth to confess. Suddenly, Pinkie sprung out of a potted plant

Pinkie: you'll lose them. Foreeeeeevveeeerrrrr
She slowly disappeared into the plant.

RD: don't question it...

Pinkie promise by Fluttershy the mare wolf December 8, 2013

Pinkie Promise 

a sworn oath to another person and if broken, the pinkie is cut off.

Pinkie promise me you wont do it again.

i promise
alright if you break it that piggy is mine.

Pinkie Promise by little duck January 26, 2016

Pinkie Promise 

The act of swearing a blood oath while pinkies are interlocked. Breakers of the pinkie promise beware...

Pinkie promise you will call me when you get back!

Pinkie Promise by annatorvizsuperzsexkie May 10, 2013