A trombone joke is a joke that often involves the numbers 69 and 420. They usually include the majority of dead 2012 memes, and referring to someone's joke as a trombone joke is usually an insult. Of course, some people find this humor hilarious and will take it as a compliment.
Cashier: That will cost you four dollars and twenty cents
Customer: Blaze it
Cashier: Sir, we don't allow trombone jokes in our store. That is a violation of our rules.
Customer: Blaze it
Cashier: Sir, we don't allow trombone jokes in our store. That is a violation of our rules.
by Sockth January 25, 2019

by Elwood P. Dowd January 2, 2007

A lovely phrase meaning crack pipe.
First used by Holy Moly:
"You are never alone with a glass trombone"
First used by Holy Moly:
"You are never alone with a glass trombone"
by downtuning February 29, 2008

A sexual act involving two partners (at least one male) in the 69 position. One partner works the male partner's penis like a trombone, while blowing into his ass, like a trombone.
by eMeS September 26, 2003

Having a girl lick your asshole while giving you a hand job. Just like a rusty trombone but with bloody hemmoroids
My girlfriend wanted to give me a rusty trombone but was surprised when she looked like a vampire when she was finished. I laughed and told her it was a bloody trombone.
by Ibestew2 August 19, 2009

when you fuck a girl in the ass and then jizz but keep on fucking her when you pull out your dick it looks like a rusty trombone.
by lkjhhjkl January 2, 2010

A very strange and rare sexual act. This is when a Female lick the back buttonhole of a male, whilst reaching around and giving the man pleasure by hand. When viewed from the side it appears as if the women is playing the trombone.
by Jounior Delgwako June 24, 2008
