Top definition
The mental illness of a drummer or percussionist. Causes the drummer to stare at a cowbell with desire to play it leading to a point where they play it at an inappropriate part in a song. People with MCD play the cowbell often as possible and it can get annoying after a while to some, but to most, it is entertaining.
"Did you hear John during practice today?"
"No what happened?"
"His Mad Cowbell Disease led to a corny drum fill and it threw everyone off. He needs to control himself."
by AveryW October 06, 2008
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug