Symptom when you scroll with your Ipod too much and it hurts.
My iPod gave me iThumb.
by John Zhong March 02, 2008
n. a condition of soreness to one's thumb from overuse on his/her iDevice (iPhone, iPad, iTouch).
Doc says I've developed iThumb and has advised me to stay off my iPhone for a few days.
by pammyv December 12, 2010