apple cinnamon bun Share definition Flag A way better nickname for your other half other than "Bae, Boo, honey, sweetie" or anything else that is given to that person whom you love so dearly. My girlfriend is my apple cinnamon bun, I love her to death. apple cinnamon bun by LittleMissWords-A-Lot November 17, 2016 Get the apple cinnamon bun mug.