Dullard Ask Urban Dictionary about Dullard Share definition Flag A dullard is some one who's dull, and often says the most stupidest yet funny things ever. kayleighs, are often known to be dullards. ''Omg you're such a dullard'' ''yeah well I am called kayleigh!'' Dullard by iBenDavies September 13, 2011 0 0 Dullard Merch Get the Dullard mug. Buy Now — $32.95 See more merch