1 definition by Kgives2me
When for circumstantial reasons (people nearby, thin apartment walls) you have to have a quiet orgasm, an opossum - otherwise known as "having a silent O."
"Man my parents were sitting on the couch watching a movie and my girlfriend and I were getting it on in the next room - we both had to have an opossum!"
by Kgives2me March 3, 2009