The process of sucking on a girl's rectum and reaching around the front to stimulate with your fingers. Called so because of the term "rusty trombone" and it's similarities to it.
"I gave my girl a rusty violin last night, and she loved it!"
"What's a rusty violin?"
"Well it's like a rusty trombone, but just for the ladies."
"What's a rusty violin?"
"Well it's like a rusty trombone, but just for the ladies."
by Darth Creampuff October 30, 2013
 Get the rusty violinmug.
Get the rusty violinmug. by Pineapple trombone March 6, 2018
 Get the Rusty Violinmug.
Get the Rusty Violinmug.