When one has spent too much time at the beach and feels lazy and tired due to overexposure to the elements.
"Bruh, I spent all day at the beach chasin' them swells and now I have beach brain. I can't even think straight, hombre"
Livin' life. Takin' it slow. It can be used as a mock ghetto phrase.
"Hey mang, hows it going?"
"Ya know. Just chillin. I'm shmoovin da broove mang."
"Nice fool. Thats the way we do."
"Yall knows it"