Allow me to retort: "dirt" in the LEO community means that two or more people become envolved in something seen, heard, or done that they agree to keep to themselves. As time moves on one or more people from that group might rise in rank or status and prefer those former skeletons not be found. In conclusion one of the members of that former agreement might not have moved as progressively as the other and might be included to mention that former event to get what they need, hence dirt.