Adj. One who never stays too long once he gets what he wants (typically drugs).
One who goes over to his dealers house strictly for business and no pleasure.
A person who takes drugs and dips out without respecting their dealer as a mate. Once package is secured, he the dippity doer, dips immediately (typically a 5 minute or less visit) without sharing the experience with his dealer (chilling or lighting one up with his dealer).
Nah man, he's that dippity doer, he wont light one up with us.
So when trying to have "The Talk" with your mother. When she breaks out the old school HorizontalHippity Dippity you should be afraid, and walk out of the room. In other words "The Nasty!"