That was already linked. :|
Read the thread before posting.
There's no clear definition for a madman, because if you just said "a madman is a replay where you have done 4 dismembers on uke......", you could just dismember Uke's wrists and elbows... If it would be 5 dismembers, add a decap and woop de woop.
But madmen do consist of many dismembers. If you dismember, let's call them "minor joints", like wrists, elbows, ankles, knees, then I wouldn't call it a madman.
This has been pretty much answered. Closing...