For those who haven't spent a lot of time in pre-osteo and osteo, here's a few things you need to know. "Breezy" is a recurring troll who reincarnates himself under a different username after he gets banned (a weekly occurrence). We mostly refer to him as Space Hamster Boo, after his original incarnation. He has a certain "tone" that directly gives his identity away. One recurring characteristic is that he will always adamantly claim that he is not space hamster, in a particularly condescending way.
I promise you his "cranial CSF fluid waves" thing is a troll effort.
Cranial CSF fluid waves are an actual thing in osteopathic medicine, although it can be hard to actually find someone who truly believes it. Literally every DO I've ever met (excluding some OMM faculty) refers to it sarcastically.