Definitions by SkunkBoi

Rusty Guitar 

The act of licking a females anal opening while reaching around and fingering her, resembling the act of playing a guitar. Somewhat like the Rusty Trombone

Non-Bro: Yo bro! I just rusty guitar'd that chick, it was insane!

Other guy: Yo you're sick man!

Rusty Guitar by SkunkBoi August 25, 2011