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2.
When one uses their hands excessively in order to animate whatever they are saying through gestures and motions; using hands too much while speaking.
"When Chong was trying to explain how the water cycle works, he was obviously suffering from an extreme case of gesticular cancer, due to his attempts to use his hands to illustrate the rain."
by Dangerloljkk March 14, 2009
 
1.
painful condition of the arms, caused by waving them about too much when you talk
"hey man, stop moving your hands so much when you talk, you'll get gesticular cancer!"
by Robbie Shepherd May 27, 2007