A standing man getting his asshole eaten out by the woman he just ass-fucked, while she jerks him off from behind. The man has to have ass-fucked the woman, hence what makes your trombone "RUSTY"
by Mr. Bator August 28, 2008

When a male is receiving anal stimulation orally, while simultaneously getting a hand-job from aforementioned anal diner.
by Daimo42 July 23, 2007

tossin the salad while yankin the tubesteak smothered in underwear. unless there is some wanted or unwanted gas. then it's reffered to as a rusty gillespie.
during the tromboning, the dressing is made while tossing the salad. with little or no lumps! thanks devin!
by the dil September 28, 2003

From Wikipedia:
Rusty trombone is a sexual act in which a man stands with his knees and back slightly bent, with feet at least shoulder width apart to expose his anus. The other partner typically kneels behind the man and performs anilingus while reaching up beneath the testicles or around the body to manually administer rapid up and down motions of the penis, mimicking the motions of a trombone player. The act is defined primarily by the physical orientation of the partners and the combination of analingus with manual sexual stimulation; however, other positions and variations are possible.
Rusty trombone is a sexual act in which a man stands with his knees and back slightly bent, with feet at least shoulder width apart to expose his anus. The other partner typically kneels behind the man and performs anilingus while reaching up beneath the testicles or around the body to manually administer rapid up and down motions of the penis, mimicking the motions of a trombone player. The act is defined primarily by the physical orientation of the partners and the combination of analingus with manual sexual stimulation; however, other positions and variations are possible.
by Fakename Bill August 03, 2014

by Mikus February 06, 2003

my trombone got rusty because it was left in the rain and rust formed all over the shaft and mouthpiece, thus it was a rusty trombone...indeed.
by John Ritter April 19, 2006

by Big Swol October 04, 2005
