(Not a teacher)
The Simpsons was taking liberties with the word "hock," as the name doesn't really apply to the anatomy of people. My dictionary says it corresponds to the ankle, but the name really applies to a somewhat differently shaped structure in quadriped mammals. When you see "ham hocks" in the store they are usually the ankle plus the foot.
Most speakers know the term "hock" better as a verb meaning "to pawn" (in a pawnshop). It is also used as a slightly vulgar verb roughly meaning "to spit." So its use as a noun wouldn't be rude but could be puzzling to some.
"Aerate" means to breathe and oxygenate the blood.