(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.

HDFD by aychdeeeffdee July 22, 2010

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HDDD (Head Down, Dick Down)

When you are out in public with your partner and someone super hot crosses your path, you got to keep an eye off of them to prove your trust towards your partner, that you aint turned on by anyone other than him/her.

Jake gotta have HDDD (Head Down, Dick Down) to prove it to Kylie that he's genuinely into her and that he isnt hoeing around

HDDD (Head Down, Dick Down) by Jeh78 June 1, 2022

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Hddhd

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Hdhdjejz Xhjsjshe hddhd

Hddhd by King Bob the third November 9, 2020

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hddndksksndn

You probably just smashed your keyboard

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hddndksksndn by Waffles And Pancakes WAP November 23, 2021

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