Where a circumcised male has anal sex with another person, the other person farts and the air escapes up through the urethra and fills the scrotum with air causing a phenomenon known as the 'Chocolate Bagpipes'

Also see Chocolate Blowfish.
Tim: "Man, last night I was rockin' Jemma's can and she farted and gave me a mad case of the Chocolate Bagpipes"
Dave: "Dude! High five!"
by Raging Erections March 8, 2011
Get the Chocolate Bagpipes mug.