Knuckle blast
When you're fingering a chick and really gettin in there
You slammed your finger in a door? How are you gonna knuckle blast that chick?
Knuckle Blasting
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."