A devious moron is running against me whose imbecility is thicker than livermush.
From the charlotteobserver.com
There Emerson hits precisely upon an essential imbecility of our own time.
From the time.com
Given your opening display of imbecility that doesn't amount to much.
From the economist.com
This is imbecility of such a high order that only military intelligence could have done it.
From the scienceblogs.com
Too many network shows are devoted almost entirely to exploring new dimensions of imbecility.
From the time.com
Stan remained a model of amiable imbecility, impervious to thought.
From the time.com
Would your oversight be considered imbecility, self-denial, moral obtuseness or outright BS?
From the forbes.com
Rio Bravo suffers from a similar approach to polite imbecility.
From the guardian.co.uk
Worse still, he learns that his brilliance is ephemeral and that he will slowly drift back to imbecility.
From the time.com
More examples
Retardation more severe than a moron but not as severe as an idiot
Stupidity: a stupid mistake
(imbecile) having a mental age of three to seven years
(imbecile) idiot: a person of subnormal intelligence
Mental retardation (MR) is a generalized disorder, characterized by significantly impaired cognitive functioning and deficits in two or more adaptive behaviors with onset before the age of 18. It has historically been defined as an Intelligence Quotient score under 70. ...
Imbecile is a term for a degree of mental retardation, as well as for a type of criminal. It arises from the Latin word imbecillus, meaning weak, or weak-minded. "Imbecile" was once applied to people with an IQ of 26-50, between "moron" (IQ of 51-70) and "idiot" (IQ of 0-25).
The quality of being imbecile; weakness; feebleness, especially of mind; Something imbecilic; a stupid action, behaviour, etc
(imbecile) A person with limited mental capacity who can perform tasks and think only like a young child, in medical circles meaning a person who lacks the capacity to develop beyond the mental age of a normal five to seven-year-old child; A fool, an idiot
(Imbecile) indicated a mental deficiency less extreme than idiocy and not necessarily inherited. It is now usually subdivided into two categories, known as severe mental retardation and moderate mental retardation.