When you had a continuous booty call and you stopped fucking that person for a while to get in someone elses pants, but then you call back (re-open) your booty call that has since gone cold to get some much needed action you been missin.
Jones: "Man I been havin some serious desert dick for a couple months now, Im dry, I gotta open up a cold case file."
Kieth: Yeah? which case you gonna open? not that whore you were slammin on the regular couple months back right? you know that bitch is a stage five clinger!