1 definition by Dr. Rockso

1) Playing the bass so low that you can rest the bottom on it on your sack.

2) Having your face shoved across concrete or the ground until your face is bloody and scraped.
1) Look that guy is Murderfacing it on the bass on stage.

2) He hit a bump, flew off his bike, and Murderfaced it for like 10 feet
by Dr. Rockso February 26, 2008
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