What is noogies?

Noogie is a term used to describe the act of rubbing someone's head with your knuckles, usually done playfully or as a prank. It is also known as a "nurgle" or "noggin knocker". Noogies are a common occurrence among friends and siblings and are often seen in popular culture, such as movies and TV shows. The sensation of a noogie can be uncomfortable or ticklish depending on the person. Some people may enjoy receiving noogies, while others may not find it amusing at all.