Masturbation technique requiring two fully functional hands. The hand on the bottom is twisting one way, while the hand on the top is twisting the other, like a pepper grinder.
"Dude, I whipped it out in Wal-Mart the other day and gave myself a Bovarian Peppergrinder until I came all over the 5.99 DVDrack!"
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!