1. in poor condition
2. the quality or state describing a woman whose vagina has suffered considerable traffic and is likely to be hosting sexually-transmitted infection.
To smack up some booty. In the novel To Kill A Mocking Bird, Tom Robinson is asked to "come in an bust up the chifferobe" for Mayella Ewell. But upon entry into the house, Mayella makes swift sexual advances toward Robinson, hence, bust up that chifferobe means to smack up a fine piece of ass.
"Hey Jim, I saw you leavewith that girl. You bust up that chifferobe?"