Top definition
Extremely fucking ridiculous; when nothing else can compare to or explain how ricidulous something is.
Dude, that party last night was Ridicidonkulous!

I once saw this kid to 50 backflips, 10 handstands, and 28 crabwalks right into this guys nose and come out his eye; it was ridicidonkulous!

Ninjas or Ninja moves are commonly described as ridicidonkulous.
by Levi B. November 12, 2007
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