cretinous

/ˈkritɪnəs/
adjective
  1. Extremely stupid or foolish; used as a strong insult.
    • He made a cretinous mistake by leaving the oven on all night.
    • Only a cretinous person would believe that ridiculous rumor.
    • That was a cretinous thing to say to your boss.
  2. Relating to or affected by cretinism (medical condition). This sense is now considered offensive and outdated.
    • The term 'cretinous' is no longer used in modern medicine because of its negative connotations.
    • Cretinous features include a broad, flat face and poor muscle tone.
    • The old medical report described the child as cretinous due to severe iodine deficiency.
Antonyms
What does "cretinous" mean? | whatsthatwordmean | whatsthatwordmean