A word that is usually a nuisance to input in a text message, with a numeric-style key pad. These words will normally be typed/written with ease on a QWERTY keyboard oriented phone.

Some of these words will eventually become easy to write, but there's always going to be that one word that irks you... and that is a thumb twister.

Such words are Feedback, tight, baby, moon, light, etc. You know which ones they are.

When you eat dirt for the first time and leave your family to build a shack in the woods