wacko or whacko /wakˈō/ (slang)

1. Mad
2. Eccentric

A deranged or eccentric person

• sign-writers
• sign-writing
• sijo
• sijos
• sika
• sikas
• sike
• Sikel
• Sikelian
• Sikeliot
• sikes
• Sikh
• Sikhism
• sikorskies
• sikorsky
• silage
• silaged
• silageing
• silages
• silaging
• silane
• silanes
• Silastic
• Silastics
• sild