| asinine |
silly or willfully stupid. [1/2 definitions] |
| ass |
(informal) one who is or appears to be stupid. [1/2 definitions] |
| bilge |
(informal) stupid talk. [1/5 definitions] |
| blockhead |
a stupid or dull person; oaf. |
| blockish |
like a block of wood in sensitivity or awareness; dull or stupid. |
| blunder |
to make a careless, thoughtless, or stupid mistake. [1/5 definitions] |
| blunderbuss |
a stupid or insensitive person; one who blunders. [1/2 definitions] |
| boner |
a stupid or foolish error; blunder. |
| brain-dead |
(slang) stupid. [1/2 definitions] |
| brainless |
without intelligence; stupid. |
| brutish |
being unfeeling, brutal, very stupid, or the like; savage. |
| clod |
a dull, stupid person; blockhead. [1/2 definitions] |
| clunk |
(informal) a dull or stupid person. [1/4 definitions] |
| cretin |
a very stupid or mentally defective person. [1/2 definitions] |
| dense |
slow-witted; stupid. [1/4 definitions] |
| dimwitted |
(informal) stupid or slow-thinking. |
| ding-a-ling |
(informal) a person who is considered stupid, slow-witted, or foolish. |
| dolt |
a stupid or foolish person; blockhead. |
| donkey |
a stubborn, foolish, or stupid person. [1/3 definitions] |
| doofus |
(slang) an insulting term for a person considered to be stupid or doing something stupid. |
| dopey |
stupid or foolish. [1/2 definitions] |