When you stick a whole banana, peel and all, in someone's ass. Then, you stomp on the tip of the banana sticking out, while making sure the banana thrusts forcefully up into their ass. Last, they will show their anal gap, while oozing the banana out!

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.