1:Involves a woman eating out a guy's ass while concurrently tugging him off. 2:A trumpet that has been exposed to too much salty water. Probably the salt included with semen.
"Dude, I like soo got the best rusty trumpet last night. Fuck sexual intercourse." "My trumpet is getting rather rusty. Tug over this this 2 ohm resistor instead. "Oh! 2 ohms! FASTER! Ohhh..."
By Christostorous III
the act of, while performing sexual intercourse on a beach, pulling out and inserting meatrod into the sand, then back into the female's apparatus. the resulting friction causes sounds to come out of her mouth resembling that of a rusty trumpet (in reality, it is merely the experience of intense, searing pain in her lower torso)
dude, you gave her a rusty trumpet? yeah man.
By crash
When a chick eats a guys ass and jerks him off at the same time.
Aaron O gives rusty trumpets to all the guys.
By Alma Oscura
when a girl gives you a reach around handjob while eating out your ass hole.
I had the freshman give me a "rusty trumpet" before taking her to the party.
By dvus
The placing of the lips to a mans rectum and blowing like you would into a trumpet while masturbating him.
Ronnie asked Jane if she would blow him a tune on the ole rusty trumpet as he dropped his britches with a grin.
By Warren3174