Hubbly Bubblies are large boobies that belong to a women that is 35 years of age or older. These are not your usual boobies. They are gigantic and out of control. Hubbly Bubblies can't be fake. These are the kind of boobies that could never belong to a girl in her early 20s.
This is when people tell stories that are mostly true or at least plausible, and it may seem like innocent casual conversation at first, but then the real message is delivered through some sort of subtle self-promotion. Then you wonder whether ANY of the damn story was real or if it was all contrived so the speaker can brag about how wonderful they (think they) are in some way.
Girl: OMG Nick Jonas was at the Packersgame yesterday and he sat in the row in front of us and he just kept turning around staring right at me and I was like wtf is he staring at. #humblebrag