Any kind of sexual method, technique or activity that you are involved in, so long as it occurs on your roommate's futon without his/her prior knowledge and results in semipermanent evidence of said activity on said futon. (Whether accidental or not.)
This term is especially viable when used as though it were a safe-sex method.
"My roommate owes me a new futon. He used the Roommate's Futon Method with his girlfriend last night."
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)