Examples from literature

• Documentation that has been obsessively dumbed down, to the point where only a cretin could bear to read it, is said to have succumbed to the 'drool-proof paper syndrome' or to have been 'written on drool-proof paper'. 
• She began by assuming that she was not talking to idiots and cretins, but to men and women of mature minds—so she could speak as she thought in a forthright manner. 
• These cretins are peculiarly a feeble-minded people.