1. An adorable butt, or term used to refer to a loved one with a cute butt or butt as cute as a turtle
2. most commonly used by couples who love turtles and refer to each others butts as turtle butt,
3. referring to the other person as turtlebutt.
4.A cute nickname to call my boyfriend because we love turtles
Danny you are such turtle butt!
or Sara my what a cute turtlebutt you have!