From Wiktionary, the free dictionary
lambão (feminine lambona, masculine plural lambões, feminine plural lambonas)
- undexterous, clumsy
- Synonyms: desajeitado, atrapalhado
- coarse, crude, rough
- Synonym: grosseiro
- stupid, dumb, ignorant
- Synonyms: estúpido, burro, ignorante, palerma, parvo