Another word for hemorrhoids.
Damn, my buttnuts are really burning!
The result of a man in tight, khaki shorts sitting on a staircase with his legs spread wide open, so that the testicles are pressed tightly against the seam, creating an ass-like shape. Can also be used in replacing a noun.
That guy on "Trading Spaces" has buttnuts!
Hey, buttnuts, get over here!
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
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.
Climax experienced as one finishes fucking another in the ass.
Hey, Devon, did you buttnut that shit last night?