1 definition by BKitty
An insult similar to calling someone a "turd" or a "piece of crap", usually someone who does or says something really stupid or annoying.
The little "butt nugget" across the street kept coming over to my car when I would drive up wanting to show me his new "cool" bike. (The kid was all of 6 years old, a pest and dorky!)
by BKitty July 6, 2006