a term used to describe moving in with your lover with the expressed agreement that no sexual activities will ensue before marriage. Similar to "taxation without representation" but with a sexual aspect.
George Washington: "Benny, I hear you have moved in with your 15th mistress."

Ben Franklin: "Yes indeed! But, we are practicing cohabitation without fornication."

Thomas Jefferson: "How patriotic. Sign here."
by keVIInXI July 8, 2011
Get the cohabitation without fornication mug.