noun phrase. The kind of hot sweaty monkey sex that can only happen between two puppets.
Related terms: puppet sex, explicit muppet sex, marionette-on-marionette violence.
Real citation: “In my travels I have found one thing to be true: There is nothing hotter than marionette-on-marionette action.”
(StuddThunders, Oct. 8, 2004, Film Talk, http://www.film-talk.com/forums/index.php?showtopic=3351)
Made-up citation: “What do you say we get your Marge Simpson doll and my Mr. Spock action figure together for some seamy, steamy, creamy, dreamy marionette-on-marionette action?”