take it down an octave
chilling out, not making such a big deal out of things
Dude, it's no big deal, just take it down an octave.
Take it down an octave
When used to address someone who is very angry, this phrase generally means "calm down" or "stop screeching" or "stop yelling." It notes that a person raises her voice in both tone and volume when she gets upset.
Sister: I can't believe you read my diary!
Brother: Whoa... Take it down an octave. It's not like I made copies of it for everyone at school. I only made copies for my friends!
Brother: Whoa... Take it down an octave. It's not like I made copies of it for everyone at school. I only made copies for my friends!