PDD stands for Pervasive Developmental Disorder and it is NOT mental retardation(which is defined by a person's IQ, and most people with autism have a HIGH IQ that is masked by their symptoms!).

It is a form of autism like Asperger's disorder.
Susie was diagnosed with PDD when she was three.
by Cyndi H. April 17, 2006
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PDD happens when When the dick was too good and you miss it and you know you won’t get it again for awhile. So that leads to a depression; post dick depression
by Your Local Therapist December 18, 2018
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PDD or "Privilege Denying Dude," an internet meme used to make fun of privilege deniers or people who fail to understand privilege or examples of privilege, like rape culture or dysphoria.

In this case, "privilege" is defined as a set of advantages given to groups considered the majority within society. (In the US, some examples are white privilege, male privilege, straight privilege, cisgender privilege, able-bodied privilege, and neurotypical privilege.) Someone who denies privilege usually fails to understand it, feels guilt or anger towards its existence, thinks that it refutes their accomplishments, or blames its existence on the unprivileged group.
The one good thing I'm getting out of this conversation is that I can probably get it put on the PDD blog.
by Raibean July 24, 2011
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Post-Dinner Dump. Highly necessary after an excellent meal. Helps clear out the digestive system to make way for the new food.
John: Honey that reception dinner was amazing! I ate way too much - I'm gonna go take a pdd.

Wife: Can't you just hold it in, for God's sake? (John: "THAT'S WHAT SHE SAID!!") Meet me at the car. Don't fall in.
by Andrew12345 November 14, 2007
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Post Drinking Depression (PDD) occurs upon waking up the day after heavy drinking and is usually accompanied by an extreme hangover. PDD symptoms include, but are not limited to, anxiety, depression, regret, embarrassment, uncontrollable emotions, and the need for isolation. A cure for PDD has yet to be developed, but symptoms can be masked by rapid consumption of alcoholic beverages; however, this will cause PDD symptoms to exponentially worsen when drinking subsides.
I have PDD and can't show my face in public today - I may or may not have done something really bad last night...
by KVGator September 27, 2010
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1) A low feeling after a night of heavy binge drinking.

2) Used when reffering to saying or doing something regrettable while in an intoxicated state. "Oh my god i have got pdd, i was sick on the bar"
by Little Jimmy Jamie July 30, 2009
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