Cool it

• Laid up in house with minor wound for dressing, relax
• "Don't get so worked up!"
• "Dude, relax!"
• Refrigeration mechanic's "Stay cool!"?
• Prelude to a fever abroad? Don't worry
• Relax, to a refrigerator technician?
• Kid almost a yob? Relax
• Relax (informal)
• Take it easy

Wiktionary Word definitions in Wiktionary
n. (context colloquial English) A period of quiet, rest and relaxation, especially after a party etc.