When one's teeth turn to liquid and then drip down the back of one's throat.
"The Office" - Health Care (2005)
Jim Halpert: Wait, what are you writing? Don't write ebola or mad cow disease, all right? Because I'm suffering from both of them.
Pam Beesly: I'm inventing new diseases.
Jim Halpert: Oh, great.
Pam Beesly: So, like, let's say that my teeth turn to liquid and then they drip down the back of my throat. What would you call that?
Jim Halpert: I thought you said you were inventing new diseases? That's spontaneous dentohydroplosion.
Pam Beesly: Nice.