Something that really grinds my gears (tip of the hat to Family Guy)

I’m only going to say this once. “Hysterical” is an adjective that refers to a specific medical/emotional condition, not an incident. As in “marked by or related to hysteria.” The root of the word is “hyster,” meaning “of or from the womb.” The word “hysterical” was originally used to describe women suffering from a neurotic ailment thought to have been caused by some sort of uterine dysfunction. Though some dictionaries will list “very funny” as a sixth or seventh definition, no doubt due to popular usage, sixth doesn’t count in my book. Screw popular usage. So although a HILARIOUS joke might cause a HYSTERICAL person to break out in unadulterated, HYSTERICAL fits of laughter, the joke itself is not hysterical.