1. (

• crazy ,
• loony ,
• looney ,
• nutcase ,
• weirdo ,

) someone deranged and possibly dangerous ;

1. (

• balmy ,
• barmy ,
• bats ,
• batty ,
• bonkers ,
• buggy ,
• cracked ,
• crackers ,
• daft ,
• dotty ,
• fruity ,
• haywire ,
• kooky ,
• kookie ,
• loco ,
• loony ,
• loopy ,
• nuts ,
• nutty ,
• round_the_bend ,
• around_the_bend ,
• wacky ,
• whacky

) informal or slang terms for mentally irregular; "it used to drive my husband balmy" ;