The process of a girl being on her period, not cleaning herself until the blood and discharge dries and crusts over, followed by a creampie and a vaginal feltching.
"Dude that party was sick! I heard that one guy was soo trashed, he gave a girl a Crusty-Rusty and didnt even know it!!"
by Jared M., Steven S. November 16, 2010
by Birdo McGee April 16, 2006
Yo motha fucka does your dick feel good,and does your ass hurt from the Rusty French-horn last night?!
by Zack Payne October 04, 2006
It's a take-off of the rusty trombone, where you 'toss the salad', but instead of the handjob, you insert your fingers like you're playing a french horn.
by T-Bone, $chmu, 'Pep', B-Love, and Nipples April 12, 2007
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
Like a rusty trombone, but somewhat straighter. Performing anilingus on your woman whilst diddling her vaginal canal. Classy move, and lets her know hepatitis ain't no thing.
by TrevtrevO May 29, 2010
by Josh April 23, 2004