Related Clues:

• Not nervous
• Like the proverbial cucumber
• Relax, slangily
• Penetrating cold
• Socially adept, in slang
• 'Groovy'
• Like laid-back jazz
• ''Calm down!''
• Not exactly friendly
• "Sounds good"
• ''Relax!''
• Close to cold
• Put in the fridge, say
• ''___ Hand Luke''
• "Neato!"