How Do You Say You Are An Idiot In Japan?

Bakamono -->> Stupid Person
bakabakashii -->> absurd, ridiculous
noroi -->> very stupid (like oh wow you are very stupid)
honoka -->> Stupid
futsutsuka -->> rude, inexperienced, stupid, incompetent
oroka -->> foolish (stupid)
Baka na ia -->> Idiot ass hole (curse - very bad / Female say)
Baka na  -->> Idiot ass hole (curse - very bad / male say)
bakayarou -->> idiot! (common use)