The phrase "a cretin" is correct and usable in written English.
It can be used to refer to someone who is perceived as foolish or lacking intelligence, often in a derogatory manner.
Example: "I can't believe he made such a silly mistake; he really is a cretin."
Alternatives: "an idiot" or "a fool."
Amongst other things, she called him a "cretin".
"First of all, I didn't call Valls a cretin.
You would be considered a cretin if you didn't.
Yes, Alien is something of a cretin, and Gatsby was a prisoner of his own fantasies.
The farrier was a cretin from Bessarabia who had died in 1842 from alcohol poisoning.
A. It sets the father up as a bit of a cretin.
If Mr. Means is the least bit concerned about being the inspiration for a literary cretin in a summer read, he is not letting on.
Even if you think Clinton is a deceptive cretin or a corporate puppet, no politician makes it this far by ignoring their party.
The Mooch, charting the difficult course of seeming hopeful about this Presidency without sounding like an outright cretin, demonstrated a tremendous aptitude for blandness.
Would you rather be a cautious puritan or a happy cretin?
AuldCurmudgeon, meanwhile, reckoned he was not just "the toxic combination of a moral cretin and windbag" but "born to be a supermarket manager" (Clegg, that is, not Charlie).
