a moronic, obnoxious jerk, (male or female) who is not worthy enough of being a full fuck-tard, yet still is a stupid fuck. just as half-pint is only half of a pint, a fucknugget is only partially human.; also, anyone who is only worth a nugget of your time.
"wow john, he's not even a full fledged asshole, t-bone's only a fuck nugget"
by Scaith November 14, 2007