A greeting. Brought into use by Poppy L.
Variances: Can use as many o's as desired.

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.

Rahoo is a greeting. It can really mean anything. You can use it if you don't know, if you don't want the person who ask you how you are to know, or just being random.
It's a good word, very good word.

verb: (1) to hype something in a fake, cocky, or suck-uppy manner, (2) attempt to make a dishonest or exaggerated statement seem correct through excitement;

General greeting or answer to "What's Up": used as hello, but in the barrio; or most often rahooo = "I am a douchebag"