Burn's French Horn 

A sexual act ( either given or recieved), when a person fist Ur anus while giving u felatio. Resembles someone playing a French horn.

Robert told me that his slutty friend Megan must have played in marching band, because she can play a mean Burn's French horn.

Burn's French Horn by J. Free November 27, 2011

Rusty French Horn 

To eat a girl's ass while fingering her as if you were cupping a french horn while playing it.

I did the Rusty French Horn after the Opera.

Rusty French Horn by Kilowog1 April 25, 2008

mexican french horn 

Term for leaf blowers, such as those used by gardeners.

Wow, it's only eight o'clock and the gardeners must be here already. I hear the Mexican french horns.

mexican french horn by dannyb December 24, 2007

dirty french horn 

Adj.

When a guy is fisting a girl and blows into her asshole at the same time.

After a long day of cleaning the house for Betty Sue, Cleatus decided to repay her in bed that night by performing the dirty french horn.

dirty french horn by Cleatus and Betty Sue March 28, 2017

rusty french horn 

Performing analingus on a female while reaching around to fist her, similar to playing a french horn.

Wow, I never realized how loose this chick was until I gave her a rusty french horn.

rusty french horn by Freddy-Wayne January 1, 2009

The French Horn 

The act of performing analingus on a woman while fingering her; so named because one keeps their hand in the mouth of a french horn while they play; sister act to the rusty trombone, which is likewise named after a brass instrument.

"I gave my girlfriend The French Horn for Valentine's Day."

The French Horn by ub|Philgamesh May 1, 2012

Rusty French-horn 

To suck a guys dick and fist his asshole at the same time.

Yo motha fucka does your dick feel good,and does your ass hurt from the Rusty French-horn last night?!

Rusty French-horn by Zack Payne October 4, 2006