That Chick from Accounting's definitions

Poppin' Fresh Boob

When a girl wears a bra that is one or more cup sizes too small to contain her breasts. The breasts are squeezed so that a small portion protrudes over the top of the bra, similar to the way the dough oozes from a Pillsbury can after the seal has been popped.

Candy: "Shoot, I must have grabbed my roommate's bra by mistake this morning!"

Brenda: "Right?! You've got some serious Poppin' Fresh Boob going on over there!"

by That Chick from Accounting March 3, 2011