1. Informal or slang term for mentally irregular
   - balmy [archaic], barmy, bats, batty, bonkers, buggy [N. Amer], cracked, crackers, daft, dotty, fruity, haywire, kooky, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky

Derived forms: kookier

See also: insane

Encyclopedia: Kookie

• foundling hospital
• foundress
• foundry
• foundry proof
• fount
• fountain
• fountain grass
• Fountain of Youth
• fountain pen
• fountainhead
• Fouquieria
• Fouquieria columnaris
• Fouquieria splendens
• Fouquieriaceae
• four
• four flush
• Four Horsemen
• Four Hundred
• four o'clock
• four times
• four-card monte
• four-centered arch
• four-dimensional
• four-eyes
• four-flusher