An intolerably stupid person.
Mike: Ted, you thought Wayne Gretzky was a wrestler? You dillybar!

Ted: Yeah I know, he was a hockey player. Man, I am a dillybar!
by Johnny Hookup September 25, 2021
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A foolish, silly, stupid or otherwise unreasonable, annoying person. May be used affectionately.

Drawn from a combination of the meaning of "dilly" (foolish, stupid), and the Dairy Queen treat, the Dilly Bar.
My neighbour locks his bicycle up indoors...what a dilly bar!

You bought a what? Dear, you're such a dillybar sometimes!
by MJmcnult May 10, 2011
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