Whysterical 

Something that is funny but you don't really know why. Usually results in some form of uncontrolled laughter over an object/person/situation normally considered uninteresting.

Whysterics are most common after a run-in with death, or during the consumption of substances legal or otherwise.

(Person 1 sees a cow eating grass in a field.)

Person 1: "Ahhahahahahahaaha! That cow! Oh my god! Sooo funny! Urgh, I'm dying!!"

(Person 1 continues to laugh uncontrollably.)

Person 2: "Dude..."

(Person 2 looks at Person 1, confused.)

Person 2: "Man you're having a proper Whysterical moment, what've you had?"

Whysterical by ScarletVincent November 23, 2010

Hysterical 

adjective
1.
deriving from or affected by uncontrolled extreme emotion.
2.
PSYCHIATRY
relating to, associated with, or suffering from hysteria

“1 - hysterical laughter"
“2 - the doctor thinks the condition is partly hysterical"

Hysterical by SirHiccle December 23, 2018

Nine hysterical women 

An overwhelming and practical response from the fans to events in a TV series, book, film, etc.

The first nine hysterical women were Torchwood fans, who sent coffee and letters to the BBC protesting against the death of Ianto Jones. Over 900 people registered on one LiveJournal community alone.

Russell T Davies: "The 'controversy' over Ianto's death is just nine hysterical women."

Or:
If (character) dies this series, they'll have nine hysterical women on their hands.

Nine hysterical women by Galadriel1010 August 8, 2009

hysterical laughter 

To come face to face with an epiphany moment that results in an instantaneous burst of uncontrollable laughter for a prolonged period of time.

I suppressed the thought of being pregnant while getting through final exams followed by a trip to the pharmacy. As soon as I saw the result of my pregnancy test I broke out into hysterical laughter.

hysterical laughter by MAM803 May 3, 2016

Hysterical Mexican Syndrome 

Hysterical Mexican Syndrome (HMS) A member of the Hispanic community whom over reacts to any situation, emergent or non emergent, which results in hyperventilation, crying, yelling, faking unresponsiveness, and abuse of the 911 system.

Maria called 911 because her baby threw up. Maria was treated for hyperventilation s/p Hysterical Mexican Syndrome, the kid was given a Tylenol.

Hysterical Mexican Syndrome by Killtankbts November 8, 2012

hysterical literature 

A series of videos where women read an extract from a book , while being jerked off by a vibrator underneath the table. After the women has an orgasm, She looks into the camera and tells you her name and the book she was reading/just read.

That girl started moaning as she read the book. I then realised she was having an orgasm. That's Hysterical Literature for you.

hysterical literature by KSSLad August 6, 2018

hysterical Bitch 

A bitch who is always overly dramatic &/or so crazy that it's funny.

(Typical Conversation)
Boy: Pass the mustard, please?
Girl: ...Why do I have to get it? Why couldn't you ask the person right beside me, huh!? HUH!?
Boy: What?
Girl: I don't like how you talk to me!!! Don't WHAT me! You, mf-er!
Boy: All I said was to pass the MUSTARD, you hysterical bitch!

hysterical Bitch by King or Queen October 9, 2006