This condition exists when a guy suddenly contacts a woman from his past with whom he has had sex, usually because he isn't getting any at the time. Like a dog that buries a bone in order to come back to it, he considers his former lover as fertile ground.
Chick #1: Rick had the balls to call me for a date last night, even though he broke up with me last summer.
Chick #2: Sounds like a case of buried bone syndrome to me. Pathetic!