Black Passage 

Another name for the N word pass in which the N word pass allows one to say The racial slur

Hey man I just got the Black Passage

Black Passage by Master476 March 4, 2021

back passage 

Noun. The rectum. {Informal}

"Grief, Bob! Last night me an' the boys got so drunk I woke up with a toy car stuck up the back passage!"

back passage by Alex Quantashassle August 27, 2005

back passage blocker 

a piece of faeces that is too big to pass through the exit hole in your bum.

"Ow, i've got me a Back passage blocker!!"

back passage blocker by Balard!!! July 8, 2005