Simple Definition of dim bulb
: a person who is not very smart
Full Definition of dim bulb
Examples of dim bulb in a sentence
He was considered something of a dim bulb by his coworkers.
<she's a dim bulb for sure, but he certainly didn't marry her for her brains>
First Known Use of dim bulb
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Thesaurus: All synonyms and antonyms for "dim bulb"
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