This a serious condition that is a direct result from texting to much. Working your thumbs till they become stiff.
This disorder may also effect hardcore gamers who play video games for long extended periods of time.
Mike: Hey Billy..you wanna play some Wii?
Billy: Not tonight man, I think I may have a STD (Stiff Thumb Disorder).
Mike: What!@#$ Is it burning?
Billy: No, I got stiff thumbs from texting to much last night. I can't use a controller till my thumbs work again.