Used to announce a person's willingness to engage in sexual activity with an attractive female. Similar to "I'd tap that." or "I'd hit it," "I'd fax it" is a great way to let someone know that you want to bang the shit out of your buddy's mom without him knowing what the hell you are talking about.
"Dude look at Sean's mom! Would you fax it?" "Hell yeah, I'd fax it for sure."
by Anthony and Kyle June 08, 2005