jackoffathon 

Literally, a masturbating or, "jack-off", marathon.

1. Any large amount of time (hours, days, etc.) solely dedicated to masturbating multiple times.

2. Masturbating vigorously multiple times, with friends/girlfriends, or alone for an extended period of time

Jack's wife had gone to her parents' house for the weekend. Since he had ordered the Playboy channel and didn't want all that hand moisturizer to go to waste, he decided to plop down in front of the TV and have himself a jackoffathon.

jackoffathon by actionman777 April 1, 2010

jerkoffathon 

See "jackoffathon".

To masturbate vigorously, either alone or with friends/girlfriends, multiple times for an extended period of time.

Jack's wife had gone to her parents' house for the weekend. Since he had ordered the Playboy channel and didn't want all that hand moisturizer to go to waste, he decided to plop down in front of the TV and have himself a jerkoffathon.

jerkoffathon by actionman777 April 1, 2010