General Brazilian
falso, deslealmão-de-vaca
Common colloquial term; 'mão-de-vaca' is slang for disloyal person
Rio de Janeiro
falso, mão-de-vaca, traidorzão
Informal and emphatic forms used in casual speech
São Paulo
falso, hipócrita
Tends toward more formal usage
Portugal
falso, desleal, hipócrita, cara-de-mocho
'Cara-de-mocho' is a Portuguese idiom meaning two-faced person