1 definition by Alberta

An orgy involving 4 people of the Quaker belief having anal sex. Usually the blood is collected in a flask and swallowed by those involved. This is supposed to symbolize the purification of the human soul and tolerance of pain which supposedly will bring those in the ssfs closer to god. Also known as 'FRIENDly sex', 'Bleeding the sheep', and 'Passafist sex'.
Me and my quaker buddies are gonna bleed the sheep tonight, ssfs style.
by Alberta February 7, 2007
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