Pretty much the same thing as breast. It is usually used by uneducated people with speech impediments, with the exception of the habit of the modern world interfering with fluent English. Some people also use this word to mock others, such as the special girl down the street, or the 'just learning to speak' two year old. Overall, breast or breastasis are loved by millions world wide.
"Look at those breastasis, there the size of soccer balls. She must be a soccer mom"
by Man-Lady1600 March 30, 2014