Dumbosity 

One who lacks in the fields of smartosity (courtesy of mi Manolita)

You are laughing on the inside because of the extremeness of my "Dumbosity"

Dumbosity by Tito January 18, 2005

dumbosity 

(usually a person) an extreme dumbass. (courtesy of Lucia P.)

Jorge, you are the biggest dumbosity ever!

dumbosity by Christy P. September 15, 2007

dumbacity 

the tenacious predisposition toward being a dumb ass. an alarmingly noticeable character trait in the lives of those whose general existence tends to disprove the theory "survival of the fittest." portmanteaux of dumbass and tenacity.

The CFO of our company added the number 29 and 30 and came up with a solution of 64; his general dumbacity is astounding.

dumbacity by sandeebean96 February 13, 2008

dumbassity 

Actions of a dumb ass nature.

Ian's dumbassity of swearing around the teachers got us all screwed.

dumbassity by hbfir December 28, 2005

dumbassity 

(Noun) Extreme stupidity and failure to grasp logic or also the exhibition such stupidity. Something one would expect from a dumbass.

"After a certain age, it would be fair to consider inability to tell time dumbassity."

"The only explanation for such property damage is dumbassity of all involved"

dumbassity by Costa January 3, 2005

dumbassity 

the tenacious predisposition toward being a dumb ass. an alarmingly noticeable character trait in the lives of those whose general existence tends to disprove the theory "survival of the fittest."

The CFO of our company added the number 29 and 30 and came up with a solution of 64; his general dumbassity is astounding.

dumbassity by sandeebean96 January 12, 2009

Dufosity

One dufus, mulltiple dufi (pl.)...with the ultimate "cluster" being referred to as...a dufosity.

The "Mixing Bowl" interstate interchange, located in Springfield, Va, is the pinnacle of dufosity...when it comes to poor transportation engineering.

Dufosity by pixelboy411 June 2, 2009