When something you didn't expect to happen does and it makes your day great.
Bob: Today is Dee Day.

Alfonso: Why?

Bob: That cute waitress at the coffee shop who repeatedly turns down my request for a date, asked me out.
by Joe Peapod March 28, 2009
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Cute ickle girl who likes cats and barbeque sauce pizzas
There she was just a walkin' down the street singin' do whah diddy siddie dum day-dee dooo....
by Charlie Charlie April 29, 2003
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A burn and or pwnage, most commonly associated with wrecking douchebags that talk shit; phrase used when destroying ignorant assholes via Diss
Nomeslayer: Aren't the lyrics to Eiffel 65's "I'm Blue" 'If i were green I would die?'

Beruuk: "No, it's Da Ba Dee Da Ba Dai BITCH"
by Beruuk Mc Hartmarmot May 30, 2010
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Did y'all hear that it's Dee Day the day for the realest nigga alive
by OtgDee April 13, 2019
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