An idiom used when an observer notices their friend engaged in an extremely self-centered digression. Serves as a reality check. Inspired through the interactions of siblings: Charlene and Sherwin.
Sherwin: And then, at the tender age of 12, I got my black belt in teakwondo, and then I won a bunch of awards in school and soon you'll be calling me Dr. Sherwin.
Charlene: Well "it's all about meee meee meee" isn't it?
girl: how big is your cock?
guy: 6 inches
girl: ok, i'll go with that
guy: you need to understand that it ain't all about the size of the boat, it's about the motion in the ocean girl: yeah, yeah whatever.