Informal/slang countable noun for a person judged to be mentally ill or acting irrationally.
un cingléFamilier, péjoratif. Some kids at school cruelly called him a mental.
Des gamins à l’école l’appelaient cruellement un cinglé.
Synonyms
insane person
mentally ill person
deranged person
Used colloquially, chiefly in UK and Australia, as a standalone exclamation meaning ‘That’s crazy!’ or expressing excitement or disbelief.
Mental! I can’t believe we actually won the match.
Incroyable ! Je n’arrive pas à croire qu’on ait vraiment gagné le match.