be (as) thick as a brick

To be remarkably stupid, dimwitted, or obtuse. I smoked a lot of marijuana when I was in high school, so I was as thick as a brick by the time I finally graduated. Jen's new girlfriend is very nice, but she's thick as a brick.

Common Names:

Name	Pronounced	Usage
Arlo	-	English
Oddr	-	Ancient Scandinavian
Rosalie	['rɔzəli]
Calvert	['kælvət]
Babbie	['bæbi]
Henrike	hen-REE-kə (German)	German, Swedish, Norwegian, Danish