Ridonculous is a highly technical term used to define anything that blows one's mind. In general usage, it refers to something that is incomprehensibly amazing.
Did you see the new Nvidia graphics card? It's absolutely ridonculous!
This burrito is so huge. So huge, in fact, that it's ... ridonculous!
This burrito is so huge. So huge, in fact, that it's ... ridonculous!
by Mkun April 25, 2006