Someone doing something as if they were a "fuck nut", or the actions of one.
I leave for a few minutes, and when I return all I see is a bunch of fucknuttery!
1:When someone does something incredibly stupid their actions are an example of fucknuttery.
2:When someone is able to be described as a fuck nut anything they may do is an example of fucknuttery.
see also fuck nut
Man 1: did you see jay?
man 2: no I did not what did he do?
man 1 : It was some real fucknuttery , he tried to make out with my sister.
man 2: That is some real stupid shit, he is such a fuck nut.