A bongacle is the resen build up on any kind of downstem on bongs and bubblers with downstems. They start collecting like little barnacles and look pretty rancid because they have been in your bongwater for a while.
"When I was around 11 or 12 my brother-in-law, who is a physician, gave me the "random fact" that the medical term for breasts is actually BOOBACLES, thus making "boob" the slang term." -ghost-from-tomorrow, Reddit.
"If I am accused of murder, and prosecuting counsel sternly asks me whether it is true that I was in Chicago on the night of the crime, I cannot get away with a philosophical evasion: 'It depends what you mean by "true".' Nor with an anthropological, relativist plea: 'It is only in your Western scientific sense of "in" that I was in Chicago. The Bongolese have a completely different concept of "in", according to which you are only truly "in" a place if you are an anointed elder entitled to take snuff from the dried scrotum of a goat.'" (Dawkins, R. 2006 "The God Delusion", Bantam Press).