Responsible partiers choose a Designated Driver to drive during a night of debauchery. The Designated Drunk is chosen by the Driver.

The Designated Drunk assumes responsibility for all drink offers given to the Driver. The Designated Drunk will take all offers of toasts, shots, and drinking competitions in place of the Driver.
Random drunk: "Hey dude! Come have a shot with me!"
Designated Driver: "Gary, you're DD. Take that shot for me."
Gary: "Alright."
by Sanzone September 29, 2005
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The designated drunk helps to occupy the police while his buddies drive away.
A cop was staking out a particularly rowdy bar for possible DUI violations. At closing time, he saw a fellow stumble out of the bar, trip on the curb and try his keys on five different cars before he found his. The man sat in the front seat fumbling around with his keys for several minutes.
Meanwhile, all the other patrons left the bar and drove off. Finally he started his engine and began to pull away. The cop was waiting for him. As soon as he pulled onto the street, the cop stopped him, read him his rights and administered the breathalyzer test to determine his blood-alcohol content.

The results showed a reading of 0.0.
The puzzled cop demanded to know how that could be. The driver replied, "Tonight I'm the designated drunk."
by Crawdadz July 30, 2007
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Your buddy who is always the desiganted drunk driver. You all go party and no one is sober but the best drunk driver drives the car home
Man your the best drunk driver so we vote your the designated drunk driver of the night
by rexero November 15, 2007
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Person in a group designated to drink and act like a fool for the immense enjoyment of others.
Before the Partwii, Lauren, the cyborg, bus surfed over to Mickey D’s with his brofriend Chuck Norris and bought a McGangbang happy meal with the funds that he jacked from his sugar momma after his disco nap that afternoon. Chuck pulled out his phone from his nuthuggers and started sexting a ginger slice with a tramp stamp that he had been friendly following ever since they shared a game of Jager pong. Lauren gave Chuck the air jerk as he noticed Tanasa the grade digger that sat next to him in his art class. Lauren gave her the “let’s just be friends” nod and grabbed his happy meal. As Lauren walked outside he saw, Bruce, the designated drunk, as he started wailing teenybopper show tunes. Bruce was manstrating again and wanted his fix of Dr. Pepper and Big league chew. The night of celebrating Lauren’s nomotion had barely even started and already he was knackered.
by Micron X February 24, 2010
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Opposite of designated driver. Person who is always drunk when going out. There can be more than one, and there usually is. Denoted by the abbreviation DD, and can therefore be confused with designated driver.
Bri: I'm tired of being the DD all the time.
Micah: You mean the designated drunk? You threw up all over yourself last time.
by notadd June 3, 2007
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The guy with the best motor-skills and coordination under the influence of a lot of alcohol out of all the dudes you hang out with. You depend on this guy to to drive you home when all of you are wasted and you trust him with your life. He should be able to take like 20 brews and still drive you back to base without a fatal accident or getting pulled over.
Since we all planed on drinking we decided that Arlen would be the designated drunk driver because he drove back to the city that one night without dying after drinking 15 shots of vlady.
by Kurt Grendel January 30, 2008
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person who, in the case that everyone (including them) in the group is wasted to the point that they can't drive, has to drive everybody home, even though they're also wasted. Usually can drive really well when drunk. From "The Hangover"
Phil: Come on, just to Barstow! Everyone's passing us!
Doug: No, I promised I would be the only one driving. And besides, you're drinking.
Phil: Oh what are you now, a cop? You know I drive great when I'm drunk!
Stu: That's very true. If you'll remember, Phil was our designated drunk driver in college.
by J Filthy Money June 14, 2010
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