Top Definition
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.
by momofuku70 July 02, 2011

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