Quite possibly, pontios, but it could also be analyzed as meaning someone who is primarily dumb or a fool etc. but who also regards himself as being more clever than others and thinking he can outsmart them.
κουτοπόνηρος -η -ο [kutopóniros] Ε5 :άνθρωπος κουτός,* που, επειδή σκέφτεται με...