Top Definition
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?"
by ScarletVincent November 21, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.