Slapping Bone 

The act of one masturbating so vigorously that the skin tears off the handlers member and they are left stroking only bone.

Dude 1:'What's that noise'
Dude 2:'Oh, Will's just slapping bone...'
Dude 1:'Sounds grim'

Slapping Bone by SM130definition May 9, 2011

slapping the bone 

Whacking off furiously

Ew! This creep ass sent me a snapchat of himself slapping the bone!!!

slapping the bone by Toxxxic666 September 5, 2016

Slappin' Bones 

Playing Dominoes

I was recently slappin' bones with E-40 and Gary Payton.

Slappin' Bones by Clutch Peterson January 6, 2012

slappin' bones 

to play dominoes

Homies at the table slappin' them bones.

slappin' bones by devon December 3, 2003