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Mad Beaver Disease. This is the beaver version of mad cow disease. The conditions include random, uncontrolled spasms which lead to violent attack of all things surrounding the subject. First encountered in the Panania area and in the local beaver stock. Currently there is no known cure.
"That beaver must have MBD he just tackled a computer."

"They better find a cure for MBD quick."
MBD by D.E March 17, 2004
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Minor brain dysfunction. Mbd was what you called persons (often childs) that had adhd or add before it had its current name.
I belive this person has a mbd because he/she act very unusual.
mbd by Wennman April 24, 2017
Related Words
Male Bop Disorder - when a male is unknowingly a bop
After reflecting upon my last relationships I realized I suffer from MBD
MBD by Pressur_Rayshon July 20, 2025
MBD / medium big dick / medium, big dick / medium sized dick, with big dick confidence
My man's got that really good dick. MBD. Medium sized dick, with big dick confidence!

I love an average, medium-sized dick, but with big dick confidence. MBD all night long!
MBD by llooxi August 12, 2025
Short for "My Beautiful Dark Twisted Fantasy", Kanye West's 5th album released in 2010.

The greatest album of all time.
King 1: Hey man, have you listened to MBDTF?
King 2: Of course, it's literally the best album of all time.
MBDTF by victorhrda April 3, 2021