Glassanine refers to the glass itself, which is made for asinine purposes (and I imagine it's pronounced accordingly). The action of using said glass is called glassaning. Or perhaps glassery? In extreme cases, the word jack may precede it.
Ever been to a Ripley's Believe It or Not museum? They have a room full of pictures of people contorting their faces and folding their tongues and stuff, and a mirror on one wall with a sign: "you try it!" So everybody makes the ugliest faces of their lives in front of this mirror, then continues through the museum. Later, right before the exit, it's revealed that the mirror was two-way, and now embarrassed visitors get an opportunity to laugh at the poor saps coming up behind them. Admittedly this is the best thing about a RBIN museum, and the only thing I remember about my trip to one at all.