To forcibly introduce a change-adverse individual to something new. Similar to dunking a hermit crab in its food and water bowls when introducing it to a new cage.
The process is usually performed for the benefit of the person being hermadunked, but against their will.
“Hey Carolyn thinks that crutons and brocoli have flavor, lets drag her to an indian place and hermadunk her till she learns what flavor is.”
“God damn it, I’ve told you about sushi 30 times, prepare to be hermadunked!”
A disease which causes you to become Hermione Granger (Herman, Hermanana, Hermiongle boingleboingle, Hermanmonster)
Doctor: I'm sorry, but you have Hermononucleosis.
Patient: Hermononucleosis? What's that?
Doctor: Well, the symptoms are very complicated, but basically it turns you into a frumpy, ugly little girl who has no friends and carries around enormous books, and you lose your popularity and your ability to draw.
Patient: Is it deadly?
Doctor: Not by itself, no. But the isolation and endless teasing may provoke suicide. And, unfortunately, we have not yet found a cure.