| fanatic(noun, crazy, nut, lunatic, enthusiast) |
| fantastic(weak, simple, silly, foolish, thoughtless) |
| fiend(noun, person, crazy, nut, fanatic) |
| flipped(silly, foolish, unwise) |
| frenzied(adjective, wrong, wild, silly, foolish) |
| fruitcake |
| gay(adjective, pleasant, happy, cheerful, jolly) |
| half-baked(weak, simple, careless, foolish, stupid) |
| hare-brained(adjective, silly, foolish, crazy, zany) |
| hilarious(adjective, pleasant, happy, cheerful, jolly) |
| joshing(adjective, light, pleasant, happy, silly) |
| jovial(adjective, happy) |
| maudlin |
| merry(adjective, pleasant, happy, cheerful, jolly) |
| mild |
| mindless(adjective, careless, foolish, stupid, unreasonable) |
| neurotic(adjective, cuckoo) |
| nitwit(adjective, foolish) |
| nutjob(noun, slang, sick, mad person) |
| obtuse(careless, stupid, unthinking, unperceptive, unobservant) |