An adjective referring to stupid things happening in the state of Florida. There's something the other Urban Dictionary authors don't realize though; the term "Floriduh" was coined by Florida-based comedian Boca Brian, and, as far as I know, none of the definitions on Urban Dictionary were written by Boca Brian. I wonder how many of the Urban Dictionary writers have heard Boca Brian.
Boca Brian once did a comedy bit called "Oh Florida." (It was a parody of Oh Canada) Sometimes, he would exaggerate the last syllable of Florida, like "Flori--duh!" On an episode of the Boca Show on 1470 WNN, he just told everyone he invented that term, "Floriduh." We all knew that anyway!