Related Clues:

• Car part, slangily
• 'I was not expecting that'
• Badass
• Physicist's measure
• "Really cool!"
• Unit at a reactor
• ''This boggles my mind!''
• "Gotcha," to a hippie
• "Far out!"
• "Like, wow!"
• ''Sweet!''
• Really cool
• X-ray spec?
• 'Lovely!,' in dated slang
• 'That's so cool!'