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1. When speaking to or being spoken to by Jared or Shannon Leto temporarily dumbfounds you to the point of forgetting everything you wanted or need to say.
2. When one is totally obsessed with Jared or Shannon Leto
3. When one sees a picture of Jared or Shannon Leto and is hypnotized to the point of delirium.

Crying, stuttering, and uncontrolled giggling are symptoms.

Other symptoms include; dizziness, heart palpitations, sweaty palms and occasional drooling.

Screaming and squealing suddenly at the sight of Jared or Shannon Leto are common occurrences and those suffering from Letoitis are encouraged to carry extra undergarments in case symptoms arise.

Also, battery operated devises are encouraged to treat symptoms.
When attending a 30 Seconds to Mars show, concert goers often come down with Letoitis.
Letoitis by momofuku70 July 3, 2011
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lutenitsa 

famous Bulgarian drug used by Bulgarian grandmothers
MAIKATI SELSKA "lutenitsa" qla li e?
lutenitsa by 30 inch true dmg February 28, 2017
Related Words

Lumanitis 

The irritation one experiences when listening to the incessant clanging of the spoon in a bowl during the creation of the concoction known as Luma.
John: Doctor, my wife keeps making this terrible noise when making ice cream. It's all I hear now! It haunts my dreams!

Doctor: Hmmm.....it would appear you're suffering from an acute case of Lumanitis.

John: Dear God, is there a cure?!

Doctor: Sure, have some of this luma!

*clanging spoon*

John: NOOOO!!!

*wakes up in a cold sweat*

John: Oh, it was just a dream.
Lumanitis by ObsidianBlade August 6, 2012

Leonitis 

An affliction in which the victim commits to multiple things simultaneously in an effort to please any and all parties, then failing to deliver results promised to one or more party.
She's got a bad case of Leonitis, man; she says she'll write that paper, go to his party, and meet you for that movie, but in the end she'll just take you to the party, and you'll just sit alone in the corner feeling like an asshole. I hope she gets an F on that paper. And dies.
Leonitis by uevuerbfoiasuihfiueh December 8, 2007

leonitis 

a disease that affects the feet making them grow abnormally large. Symptoms include being last boy, erratic dancing and disliking mayonnaise. Occasionally growths known as conor and billy will grow on shoulders. Treat with pineapple juice and dalkey.
when walking through bray seeing a young boy with size 13 shoes - whoa that's leonitis
leonitis by C. Rumpet August 24, 2007

the leonitis 

what you feel when watching any movie too many times, specifically 300 than trying to quote it at any and all times
"dude, after watching 300 a million times i fel i've got the leonitis"
"all these people quoting 300 is giving me leonitis
the leonitis by carrington II March 27, 2009
Getting a red tongue and waking up with bad breath from eating too many cherry cough drops
Carrie has a red tongue and bad breath in the morning due to acute ludenitis.
Ludenitis by Grandpa Matt April 6, 2022