Top Definition
(aych dee eff dee): Humour Detecting Face Deficiency. Someone who can not smile, despite how hard he/she tries. Much like plastic, it was discovered and named by accident. May be accompanied by panic attacks, major depressive disorder, or other mental/anxiety related complications.
I went to the Wanda Sykes live show with my friend and she didn't even crack a smile! I think she has HDFD.
by aychdeeeffdee July 21, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×