To try to act normal or to blend in with the environment/other people. This is usually to prevent getting into danger or trouble.
Example 1: Hey, we gotta play it cool, we're in gang territory.
Example 2: If you don't play it cool you might get in trouble.
by BigBoi Gaming December 10, 2019
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To pretend you're not as anxious as you really are; usually used in terms of dating, deals, or any life-altering events.
Dude let HER call YOU, it's only been two days-- play it cool.
by Douglas Young November 27, 2007
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