Dimwit
ahd-5
noun.
A stupid person.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
A person who is
deficient
in
intelligence
.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a stupid incompetent person
Word Usage
"The dimwit is always OT and has next to nothing to say."