(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
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.Buy the mug