1 definition by SkunkBoi

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!
by SkunkBoi August 23, 2011
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