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1.
A mistaken pronunciation of a "rusty trombone" - where you eat someone's ass while reaching under to give them a handjob.

"Rusty" because you're eating ass. Get it, get it? lolomg
She asked me what I wanted for by birthday and I told her a rusty trombone would be absolutely lovely.
by Chris March 09, 2005
 
2.
The act of receiving a hand job while having your partner blow on your butt hole.
Bro, last night I got a russian trombone from this Indian hooker and my butt hole is still moist!
by GRDN June 25, 2012
 
3.
when you give a guy a rimjob and a handjob at the same time
I gave Karl Malone a Russian trombone last night!!!
by TheMailMan KarlMalone April 29, 2003