Flatulence which loosens the bowels enough to void an amount of fecal matter, be it just a bit or an entire load. In other words, when you mean to fart and accidentally shit yourself.
Aww, man... I just let a hard fart go, and now I've got to throw out my new underwear!

You should check your drawers, man. That sounded like a hard fart to me.
by Talmanes November 16, 2005
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The forcing out of flatulence in the hopes of either encouraging a bowel movement or creating a loud noise to impress your friends. Hard farts can be very dangerous in that they can be followed by moderate to severe pain that can either be temporary or more chronic as in the case of hemorrhoids. They can also result in the soiling of oneself and creating and embarrassing situation
"Johnny pushed a loud hard fart out. Everyone laughed. Johnny abruptly left the party, never to return"
by whoins February 15, 2009
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A fart in solid form. In other words, SHIT.
Dude, I dropped the biggest hard-fart a minute ago. You might want to stay out of the bathroom for a while.
by Steve_Juggernaut February 12, 2010
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There are already several definitions for this term on here, but all of them are wrong.

I think people must be confusing "hard fart" with "dense fart", and those terms are not the same thing.

A "hard fart" or "hard gas" is a medical term, something you might tell your doctor or your doctor may ask you about. A hard fart is a painful fart that sometimes has to be squeezed out to relieve pressure in the bowels as a result of constipation. You will discuss this with your doctor as a symptom of constipation. Usually, there is no defecation associated with a hard fart because of an underlying constipation issue. Sometimes a small amount of solid particles or "fecal debris" may pass along with this fart leaving skid marks, but this is not the same as a "shart".

Conversely, a "dense fart" comes about as a result of a diarrhea issue, usually a precursor to blowing mud. Hard farts are a precursor to having a painful, dry bowel movement sometime (often days) later.
Doctor: "How often do you have bowel movements?"
Patient: "About every 4-5 days, but I have a lot of hard farts for a few days prior to having a BM."
by Trumplodyte November 15, 2019
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An expression of shock or suprise similar to "shit on my dick"; Pootin' on a pecker
Brennon: I just found out I got AIDS

Ryan: Well fart on my hard on! that sucks for you!
by Frankie Puscher November 13, 2012
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Fart Hard means something that is veryy hard like SO HARD. It describes so muchhhhhhh hard .
If you cant do a thing that seems hard, you say "ITS SO FART HARD!!"

I hope you understand :)
Example:

Student: THIS TEST IS SO FART HARD, I CANT ANSWER IT
Example #2:

GAMER : THIS GAME IS SO FART HARD, I CANT WIN
by Aunty Joey July 22, 2021
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