Crackpot
Else clues• An eccentric
• Common slur on political talk radio
• Crazy one
• Ding-a-ling
• Eccentric
• Eccentric individual
• Eccentric one
• Eccentric sort
• Flake
• Fruitcake
• Lunatic
• Nut
• Nut case
• Nut job
• Nutball
• Odd sort
• Oddball
• Off-the-wall sort
• Screwball
• Wack job
• Wacko
• Wacky one
• Weirdo
• Someone regarded as eccentric or crazy and standing out from a group