It means...OUCH!...a ruptured disc.
The sound of popcorn popping is a series of rapid, popping noises as the kernels burst open and turn into fluffy popcorn.
Typically a single pop followed by some hissing. If you continue driving there may be popping or knocking noises as you ruin the engine.
The sound of popcorn popping can remind people of the excitement and anticipation of watching a movie or the fun of a festive occasion.
The best thing to do when your ankle keeps popping when you bend it and apply pressure is to visit a doctor. Even without any sound of popping the ankle may need to have a X-Ray.
No, 'popping' is not an onomatopoeia. However, just the word "pop" is regarded as an onomatopoeia.
cerches
The distinctive popping sound of popcorn comes from the rapid expansion of moisture inside the kernel as it heats up, causing the kernel to burst open and release steam, creating the popping noise.
diffraction
We hear a popping sound because of the presence of hydrogen gas and hydrogen gas burns completely when exposed to fire.
Crepitation or Crackles
Unnatural.
Often, you will hear a popping or clicking sound when you are in a turn.