A large set of breasts that stick out far beyond the body, so that the woman who owns them can not see her feet. A boobshelf often catches spilt food, leaving stains on clothing, often along the cleavage line. Boobshelves can be useful for laying plates while scooping food into your mouth or resting books for comfortable reading.
My boobshelf is so big, it hangs over the table when I eat. I am constantly cleaning food stains off of my shirts because of my boobshelf.