The physiological interaction with ones own self or others sexually, while being predominantly aroused by image, sound, or text provided via cyberspace. internet.
1. The act that men without boyfriends/girlfriends do. Any self-respecting woman would never bring herself into doing cyber sex.
2. Like phone sex, but you type instead of talk. It's real pathetic, but hilarious at the same time. The "woman" is usually a man. 95% of the time, the "woman" will reveal herself to be a man at the end of cyber sex, which in turn REALLY pisses the other guy off, resulting in death threats and vows to kill the guy's family.
The horrible spawn of lonely 75-year old hairy fat men in order to virtually de-virginise lonely 13-year old nerds over the internet. Describing oneself as a sexy 19-year old pornstar goes a long way.
"Damn man the cyber sex i'm getting lately is great"
"You sure it's not one of those 75 year old guys right?"
"...."
"HAW PWND"