if you're under 13: you're not cool enough to know what it means. come back when you wake up and its sticky in your danger zone.
if you're over 13: why the FUCK would you need to look up the definition of "jack off?" did your balls not drop yet?
if you're over 13: why the FUCK would you need to look up the definition of "jack off?" did your balls not drop yet?
by un-dumbassify yourself, please January 03, 2010
Jack Off: When a male masturbates.
by ~Keyona January 10, 2004
Most people like jacking off
by Anonymous April 30, 2003
by ThatGuyWithTheHook May 04, 2010
When a young man or old man (can be both) get hard or also known as horny, they're penis starts to rise up. If they don't have anyone at the moment to help them with their needs, then they go to a private place such as the shower or their bed or also local wal-mart and go in a up and down motion on their penis. Causing them to feel the pleasure of having sex with a girl, or also feel the burn. When they reached their maximum pleasure a tasty substances called cum squirts out, and that is when he or she knows they are done jacking off.
by iknowuwithallmymight May 14, 2010
by Defineking9045 December 19, 2015