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buggy, balmy, dotty, haywire, barmy, bats, batty, bonkers, cracked, crackers, daft, fruity, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky | informal or slang terms for mentally irregular | |
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silly, wacky, zany, sappy, whacky, cockamamie, cockamamy, goofy | ludicrous, foolish |