An insulting term for sexual intercourse. Used by Shakespear in Othello.
Roomate: Oh crap dude! We need some kind of signal like a sock on the doorknob or something. I cant believe I walked in on you and your girl making the double backed monster.
by scott trowbridge June 9, 2006
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the look and sound of two people having sex that leads others to assume there is a double backed monster in the bed.
i walking in and it looked like there was a double backed monster on her bed.
by bnt07 November 22, 2011
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