1. Someone who expresses a complete lack of common sense or intellegence. After an act of dipnut has been done others who see it are nearly required to point at the person who commited the act and say, loud enough for all those around to hear, "DIPNUT!" thus making the person feel bad about themselves.
by BlArGh October 20, 2003
Any person who is stupid or commiting a stupid act to be cool but fails miserably without knowing they have made a jackass of themself.see also dipwad, jackass.
Jimmy tried in vain to be like his idol Johnny Knoxville, but ended up making a dipnut of himself.
by wouldn't you like to know April 05, 2004