Obviously, jacking off while typing. typing may be anything from a facebook status to something more reasonable to typesturbating, such as searching porn. Typing is usually done by the dominant hand.
To masturbate by sticking your dick in a toaster and turning it on. Commonly leads to WaffleCock. Famous toasterbaters include Abraham Lincoln, Lady Gaga and Barack Obama
Dude, did you see that video of that guy Toasterbating?