A condition that comes from sitting in front of the computer all day jerking off constantly to internet porn.
"I guess I have to stop masturbating so much, I think I'm getting penis elbow."
" Yeah why don't you stop looking at those porn sites constantly and put the dick down. Your arm might feel better. Your dick might not be so sore either"
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!