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1. Someone who is both ignorant and an asshole.
2. George W. Bush.
Tommy is being an ignoranus. Somebody should suicide-bomb his ass before he grows up and convinces 59 million half-retarded evangelical rednecks to vote him as president, and continues to fuck the country.
by Andy November 28, 2004
A person who is not only ignorant, but is also an asshole.
by Anonymous March 20, 2003
Someone who is both stupid and an asshole.
"Mike is such a snobby know-it-all, I wish he wasn't such an ignoranus all the time."
by 5seconds October 14, 2005
A person who's both stupid and an asshole.
He's a huge ignoranus.
by Oracle99 April 17, 2003
A sophisticated way of saying dumbass. the sophistication emphasizes that the person or thing being referred to is also pompous.
"Your boss is so stupid!"
"Yeah, What an ignoranus"
by John Diss April 11, 2007
a person who's both stupid and an asshole
one of the winners in the Washington Post's Style Invitational - words altered by adding, subtracting, or changing only one letter and supplying a new definition
by dp March 17, 2004
Somebody who is both ignorant and an arsehole.
My boss / boyfriend / girlfriend / is such an ignoranus.
by The Lady Miss Merna. May 18, 2006
a person who is both stupid and an asshole....
my highschool vice principal was an ignoranus
by seregil November 02, 2004