A phrase meaning to jack off while nobody is in your house and you are bored. If one is to "man the fort" then all of your visitors must leave your house immeadiately or they will be forced to watch you jack off into your own hand by using the internet as your material. One may be a true masturbater if 1. he can jack off without any material other than his state of mind. and 2. if he can jack off without the use of his hands
Yo Gordo! I'm going to man the fort right after I finish typing this senten... ahh that was good.
by Tom I. August 20, 2006
Another term for the act of masturbating.
See you later Tommy, I'm gonna go man the fort while my parents are out.
by Bob Sobchek June 09, 2006

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