1 definition by Symmetria

Getting a tattoo of letters on each finger (generally excluding the thumbs) in order to spell a word or words about eight characters in length. The tattoo goes between two knuckles per finger on the outside of the hand.
"I had a little knuckle blasting session last weekend at the tattoo shop. It says 'hold fast' because I'm a sailor."
by Symmetria May 21, 2014
Get the Knuckle Blasting mug.