When one friend in a group who is the designated driver for the night, continually manages to get drunk whenever it is their turn
Kid 1: Who is DD tonight?

Kid 2: Ramos

Kid 1: Ramos? Damn, I better hold back tonight. That kid always becomes a DDD: Designated Drunk Driver
by MikeyJoy January 6, 2008
Get the DDD: Designated Drunk Driver mug.