Sound resulting from impact of end digit of one's middle finger
against one's ring finger
when latter is rested upon base of one's thumb, resulting from middle finger
being pressed at angle against ball of thumb until pressure overcomes friction of contact between middle finger
and thumb, at which time inertial friction yields to pressure and middle finger
alights rapidly upon ring finger
; NOTE: all actions described occur in single hand. Word.
Yo 'sup can you snap? Didn't think so, fool.