Punching in the face in a circular motion while holding onto someones hair

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.

To be riding in a vehicle listening to music extremely loudly then getting out the car at stop lights dancing around the car in front of pedestrians and other drivers... "that boy slappin ..oh damn now he be mollywhoppin next to us"

In this case mollywhopping is riding on big ass rims