1. A man who is a stupid incompetent fool
   - fathead, goof, goofball [N. Amer], bozo [N. Amer], goose, cuckoo, zany 
2. Male donkey
   - jack

Derived forms: jackasses

Type of: ass, boofhead [Austral], charlie [Brit], drongo [Austral, NZ], fool, galah [Austral], juggins [Brit], jughead [N. Amer], mampara [S.Africa], meathead, moegoe [S.Africa], muggins [Brit], sap, tomfool

Encyclopedia: Jackass

• black-necked cobra
• black-necked grebe
• black-necked stilt
• black-necked stork
• black-seeded
• black-stem spleenwort
• black-stemmed spleenwort
• black-tailed deer
• black-tie
• black-winged stilt
• blackamoor
• blackback flounder
• blackball
• Blackbeard
• blackbeetle
• blackberry
• blackberry bush
• blackberry-lily
• blackbird
• blackboard
• blackboard eraser
• blackbody
• blackbody radiation
• blackbuck
• Blackburn