thumbilitis 

pain and cramping in the thumbs that comes after many hours of texting

Robert: Hey Doc, after I have been texting for 3 or 4 hours, my thumbs cramp up and I can hardly move them.
Dr: it sounds like you have thumbilitis, you may not be able to text for a while!
Robert: Can I get a work note for that?

thumbilitis by Weegle November 7, 2009

thumbitis 

Thumbitis is the red blistery affect that occurs on the underside of the thumb. The most common cause of thumbitis is too much text messaging with mobile devices.

(as defined on www.thumbcare.com)

I got thumbitis using my Blackberry too long. Now my thumbs are numb and blistered.

thumbitis by thumbcare.com January 23, 2009

tumbrilitis 

Intentionally rounding up human beings and placing them on mass transit to ship them away or out of an area. Usually these are cattle cars and the purpose is not good.

During World War II, the German government practiced tumbrilitis against innocent people.

tumbrilitis by Someone123454321 February 22, 2009

Awkward-Thumbitis 

An imaginary disease which one contracts when they cannot spell due to awkward thumbs. It usually occurs in adolescents, as such individuals simply cannot spell! When one is texting and they misspell a word accidentally, this is when Awkward-Thumbitis occurs.

Person 1: hey, what u foim tonight?
Person 2: what??
Person 1: dammit! *doin I have awkward-thumbitis!!

Awkward-Thumbitis by woopdidoop May 16, 2018