HDA 

Acronym for "Hammered Dog Ass". Completely lacking in aesthetic merit, extremely ugly, displeasing to the eye and viscera. The resulting visual summary of an already homely subject after a losing impact with something large, heavy and iron.

May also be used to express feeling under the weather, i.e. "I feel like____."

M: That girl was pretty cute last night man, it's a shame I wasn't able to go home with her.

B: On the contrary, she had the beak of a falcon, no chin, and a dusky mustache. She looked like HDA, (Hammered Dog Ass.)

HDA by bwho December 9, 2008

HDA  

"HIGH DEFINITION ASS"
The perfect ass in jeans!

"Holy smokes, check out the HDA on her."

HDA by EH&CH February 19, 2009

HDA 

Horny DumbAss is a disease often shortened to HDA. HDA is commonly caused by Water Wiggles, an old trend.

"Wait you have a water wiggle?"
"Yeah."
"Make sure you don't get HDA!"

HDA by radierocult January 16, 2020

HDA 

Head Disk Assembly, the part of a computer's hard drive which stores the data.
Typically when a drive experiences the Click of Death (ake the OMGWTF I just lost my data) noise the head comes in contact with the disk due to the collapse of the micrometre thickess air bearing from contact with a particle, resulting in massive damage known as a head crash.

Normally the end result is a bricked hard drive, which is recoverable if you are lucky and have a couple of K$ to spend on data recovery in a clean room.

Interestingly a hard disk will instantly crash if opened up and smoke blown onto the disk while spinning, useful for demonstration purposes but ruins the drive

Sometimes a failed drive can be salvaged by the careful replacement of the head assembly from a donor drive, this is a last resort and can make things worse in most cases.

Dude, your HDA just went flatline. Hope you have backups.

HDA by conundrum8472 September 26, 2010

HDA 

Hands-Down Adorable- someone who is so cute it's almost unbearable

I think every American girl agrees that Michael Cera is HDA.

HDA by clockiewitch July 2, 2009

HDA 

"Hit Dat Ass"

"ey' man, I see you talkin' to ol' bird over there. HDA or wha'"

HDA by C40 December 23, 2011

HDA 

Home Display of Affection similar to PDA but at home,

When your Parents show kiss or make-out in front of you or HDA.

HDA by Aalissa April 17, 2015