1727, from Japanese samurai warrior, knight, originally the military retainer of the daimio, variant of saburai, nominal form of sabura(h)u to be in attendance, to serve..
The bubbles make a noise when they burst. This is called cavitation. Another cause for painless popping in the knee is when the ligaments and tendons catch as they go over a bony lump and pop when they snap back into place. Or the clicking and popping may be caused by catching on soft tissue or scar tissue within the knee.
Posted on February 9, 2012 by. Regular Ashtanga or Vinyasa yoga practice can cause elbow pain at one or both sides of elbows or clicking sounds as the elbow is straightened, or locking of the joint.