Doltish
/ˈdəʊltɪʃ/
Definition 1 of 1
Pro Tip 1/3Negative Connotation
Doltish suggests a lack of intelligence. It's an insult and might offend if used directly about a person. 
His doltish reaction to the prank wasn't appreciated.
Pro Tip 2/3Informal Context
Use 'doltish' in casual settings or personal writing, but avoid it in formal or academic writing. 
The character's doltish antics made everyone laugh.
Pro Tip 3/3Describing Actions
Doltish can describe actions or decisions that seem unwise or show poor judgement. 
Buying a car without checking it properly was a doltish move.