| Oaf |
| Sap |
| Daw |
| Clod |
| Fool |
| Bozo |
| Yo-yo |
| Idiot |
| Dummy |
| Ninny |
| Klutz |
| Moron |
| Dunce |
| Cluck |
| Dimwit |
| Doofus |
| Nitwit |
| Lummox |
| Nimrod |
| Bumpkin |
| Buffoon |
| Airhead |
| Pinhead |
| Dullard |
| Jughead |
| Dimbulb |
| Dumbass |
| Big goof |
| Dim bulb |
| Half-wit |
| Imbecile |
| Lunkhead |
| Dummkopf |
| Numskull |
| Bonehead |
| Dumbbell |
| Clodpoll |
| Dim type |
| Blockhead |
| Simpleton |
| Numbskull |
| Ignoramus |
| Lamebrain |
| Birdbrain |
| Schlemiel |
| Dunderhead |
| Nincompoop |
| Muttonhead |
| Bubblehead |
| Noodlehead |
| Stupid one |
| Big galoot |
| Chowderhead |
| Knucklehead |
| Foolish one |
| Total idiot |
| Cabbagehead |
| Lightweight |
| Witless one |
| Featherbrain |
| Stupid person |
| Stupid fellow |
| Foolish person |
| Fumble-fingers |
| Mental halfwit |
| Dull-witted one |
| One isn't sharp |
| Dim-bulbed sort |
| Dunce cap earner |
| Dunce-cap wearer |
| Not-so-sharp sort |
| Not-so-bright sort |
| Simple Simon, e.g. |
| Brainiac's opposite |
| One who isn't swift |
| Dumb & Dumber" type |
| Dunce-cap candidate |
| One who isn't quick |
| No rocket scientist |
| Definitely no genius |
| One not using his brain |
| Slow-on-the-uptake sort |
| Unlikely Mensa candidate |
| Hardly a rocket scientist |
| He's not a Mensa candidate |
| One who is not very bright |
| Hardly the rocket scientist |
| One who's slow on the uptake |