What is Apoplexy?

Legal Definition
Apoplexy (from Ancient Greek ἀποπληξία, meaning "a striking away") is bleeding within internal organs and the accompanying symptoms. For example, ovarian apoplexy is bleeding in the ovaries. The term formerly referred to what is now called a stroke; nowadays, health care professionals typically specify the type of apoplexy, such as cerebral, ovarian and pituitary apoplexy.

Informally, apoplexy is associated with being furious, especially as "apoplectic".
-- Wikipedia
Legal Definition
In medical jurisprudence. The failure of consciousness and suspension of voluntary motion from suspension of the functions of the cerebrum.
-- Black's Law Dictionary