1 definition by alswell

The act of pursuing a relationship with a young girl with the expectation that her bosom will grow over the course of the relationship, thus creating the return on your inbreastment.
"Dude, I heard your dating like six 13 year old girls."
"Yea man you gotta diversify your inbreastments."
by alswell December 27, 2008
Get the [Inbreastment] mug.