The phrase janky ass glass refers to low end bongs made of glass from China or other low quality glass. Often this phrase is used to describe goodstash bongs which use a grommet instead a glass on glass joint.
Matt: Dude have you been to skatesurfsmoke in Hermosa? They have goodstash bongs.
Ryan: Yeah I heard about it from some punks who thought they could skate. That place sure does have some janky ass glass.
Matt: I know!! That's exactly what I thought when I walked in there!
The action of putting a glass mason jar on the erect penis, your partner then sits on it and clenches their asshole as hard as possible until the glass breaks and turns your dick into a poorly maintained hotdog with extra sourcraut
Susan put some "Glass in the ass" last night, My dicks still looks like it was mauled by a tiger!
erotic video. Man squats over a small glass, lowering his anus, forcing the glass into his asshole. Upon completely entering his asshole, the said glass breaks. He proceeds to pull the broken, bloody pieces out of his asshole, while the horrified viewer screams and cringes.
man, that lecture was as painful as glass in the ass.
That asshole at the bar was totally a glass in my ass.