Nasty

Riddle: Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot, All is cool where it is not. What is it?

Answer: A silent but deadly fart. I encourage you to dislike...

Source: https://www.riddles.com/index.php/5017

Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot, All is cool where it is not. What is it? — Nasty by Tinywolf v1.

Riddle: Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot, All is cool where it is not. What is it? Answer: A silent but deadly fart. I encourage you to dislike... — by Tinywolf v2.