loony Meaning, Definition & Usage

1. noun someone deranged and possibly dangerous
   weirdo; crazy; looney; nutcase.
   
2. adjective satellite informal or slang terms for mentally irregular
   loco; wacky; loopy; bats; haywire; nuts; balmy; kooky; nutty; barmy; around the bend; buggy; kookie; whacky; crackers; round the bend; daft; dotty; batty; cracked; fruity; bonkers.
   
   • it used to drive my husband balmy

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