When two people are walking (or possibly running) towards each other and their destinations are in separate directions not having time to stop and chat. The two individuals will engage in a quick greeting/farewell conversation, while still keeping their same pace as they pass each other.
"Drive-by" and "Conversation" = Driversation
*A Driversation may be while walking or walking quickly a light jog or a run*
A person you hate intensely not because they deserve such hatred but because they serve as a focus for your general hatred. A healthy way to dispense with excess animosity.
Jake's not really that big an asshole. He just serves as my hate sink.