When you receive a goatsie and then have your ass pubes interweaved so that it can be played like a harp.
Joe:Awww man I woke up this morning with my ass so sore and my pubes interweaved.
Adam:Dude thats a rusty harp!
Joe:Jennys a sick hoe.
Adam:Dude thats a rusty harp!
Joe:Jennys a sick hoe.
by Galbs August 3, 2008
Its like dueling banjos, but without the dueling or the banjos and with a mouth harp and an asshole thus making it a rusty mouth harp
by woonage December 13, 2008
by Shakyboi December 26, 2018
When a male eats a female’s asshole while simultaneously fingering her vagina with a minimum of two fingers
by pikachu AA June 14, 2021