Top Definition
1. The worst insult you could say to a complete dumbass. You can say this to a faggot that doesn't understand the word, like a teacher, or if you are in an argument and you cannot think of a comeback you can just finish the bitch off with Fiddle-De-Doo.
Doucher- "Your mom!" everyone laughs!!!

Awesome Guy- "Well Fiddle-Dee-Doo" everyone shits bricks!!!
by MichaelCapps January 07, 2011

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