This is when one individual rides on top of another (Usually in a Sexual Manner) and every time the person on top rides they make a "Quack! Quack!" sound.
Alesha Rode Tristan well, all you heard in the neighbors' house was the loud, repeating of the words "Quack!" "Quack!" followed by a banging sound. Wonder what they are up to. This is The Ruddy Duck.