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1.
1. Visible particles of food present in feces (peanuts, carrots, etc).

2. An acquiantance who constantly brags.

3. State of a ballsack post-anal insertion, typically achieved during intercourse with major league skanks.
1. "Dude come peep these turdnuts before I flush them down to our water supply!"

2. "So um guess who just got a job wearing suits all day?" "You, turdnuts?"

3. "Wow that bitch's asshole was so loose I had no problem making turdnuts!"
by twix715 December 29, 2010
 
2.
Someone that is crabby and annoying. They always feel like killing them selves from the depression that does not really exist. A turdnut also has ginormous boobies and a fat booty!
Kristina is a turdnut because she is a loser with no friends.
by Fallinstar258 December 26, 2010
 
3.
Someone who is completely outside of their damn minds and yet also full of crap.

Could also be a very hard solid and almost walnut shaped piece of poop, the kind that hurts when it comes out and causes the wet cheeks affect (when toilet water and/or piss splashes onto your rear from the impact of the solid fecies)
"That turd nut over there just told me that she saw a special on c-span about Canada, USA, and Mexico becoming one country."

"I am having the worst night possible! I was on a date, hadn't had my benafiber and I passed a huge turd nut at the restaurant and when I went to wipe my wet ass there was no toilet paper so I had this huge yellow ring on the seat of my white skirt the rest of the night"
by AMDAK1718 December 14, 2009