1 definition by mrdon

Top Definition
The act of using Metallica music while exercising (ie. working out, running or biking).
My daily metallicize has resulted in greater health and fitness with some minor hearing loss.
by mrdon May 15, 2013

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