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similar to a fucknut, but toned down for your grandmother.
buttnut by semoore September 4, 2003
something you call your little brother regularly and is topped off when accompanied with a noogie.
see above for other examples of the term buttnut
buttnut by slightlybonkers March 6, 2008
An insult much like Buttface but much more gruesome and always brings the victim of your insult to a loss for words.
You Buttnut you smell of rotting cheese.
Buttnut by Corrie July 29, 2005
Climax experienced as one finishes fucking another in the ass.
Hey, Devon, did you buttnut that shit last night?
buttnut by JosueFender August 8, 2008
i have buttnut because of jennerfer
buttnut by truepopperking33 March 31, 2017
A bowel movement characterized by the acute, forceful passing of stool after having held it in for an extended period of time or as a result of constipation. Accompanied by a sense of relief and satisfaction similar to that of an orgasm. The word, indeed, is a combination of “nut,” a common colloquial verb meaning (of a male) “to ejaculate semen,” and “butt,” a colloquial term for buttocks.

While related to the relief one experiences after a bout of diarrhea, the stool passed as a result of a buttnut is typically solid or semi-solid, and sometimes even compacted. Conditions leading to the possibility of a buttnut include changes in diet such as a sudden increase or decrease in the consumption of dietary fiber or heavy consumption of highly acid and spicy foods like Buffalo wings, especially in combination with alcohol.

Note that a buttnut proper is not simply a large bowel movement. Rather, a buttnut proper is characterized by a feeling of tension and pressure combined with the inability to pass the stool giving way suddenly to an acute bowel movement. The acuteness of the buttnut is the source of the pseudo-orgasmic pleasure and relief one feels afterward.
Man, I was clogged up all day but then I sat down to take a piss and look at Instagram during work and had an incredible buttnut. I put my phone down, shut my eyes, and just vibed with it.
buttnut by garth_from_chem_class December 22, 2021