reinforced cage
The act of supergluing one's asshole shut and timing how long it takes a sexual partner to pierce through the anal blockade with his/her tongue.
Tenured Professor: "If you want to learn the secrets of the universe, you're going to need to tunnel deep."
Grad Students: "That's one reinforced cage I'm willing to break through."
Grad Students: "That's one reinforced cage I'm willing to break through."