Related Clues:

• 'Far out!'
• Marvy
• Staff
• 'Cool!'
• See 50-Across
• 'Holy cow!'
• 'Gee!'
• Isle of ___
• Cool
• Enthusiastic exclamation
• Mild oath
• 'Holy mackerel!'
• 'Gee whillikers!'
• 'Holy smokes!'
• See 11-Down