1. the quality or state of being dopey; stupidity or lack of mental sharpness
Usage: informal
2. the quality or state of being drowsy, sluggish, or dazed, often from medication or fatigue
Usage: informal

Examples

• His dopeyness during the test made it clear he hadn't studied.
• The medication caused a dopeyness that lasted several hours.
• She complained about the dopeyness she felt after waking up so early.
• His dopeyness was obvious when he forgot his own phone number.
• The dopeyness from the cold medicine made driving unsafe.
• Everyone noticed his dopeyness when he walked into the glass door.