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
Climax experienced as one finishes fucking another in the ass.
Hey, Devon, did you buttnut that shit last night?
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!