Related Clues:

• Inside stuff
• Dull-witted one
• Stupid person
• Bird that is no more
• Dumb one
• Bozo
• One slow on the uptake
• Excellent, in slang
• 'Sweet!'
• Drug
• Ignoramus
• Extinct Mauritian
• It's been extinct since the late 17th century
• Bygone bird
• "Cool!"