It's cool,don't worry bout it ,that's alright ,yes mate, sweet

Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy

Calm used in this way is a from only alpha males use when making plans to show that they all agree with whatever it may be.

When something is chill, cool, relaxed or alternative way to agree or confirm usually to plans

To be down with, or to express want to partake in a certain activity.

Used to express agreement or to describe something/an event that has no conflicts

C A L M is an album released by Luke Hemmings, Michael Clifford, Calum Hood and Ashton Irwin from 5 Seconds Of Summer on March 27th 2019
Track list:

1. Red desert

2. No Shame
3. Old Me
4. Easier

5. Teeth

6. Wildflower

7. Best Years
8. Not in the Same Way
9. Lover of Mine
10. Thin White Lies
11. Lonely Heart

12. High

13. Easier LFTV
14. Teeth LFTV
15. No Shame LFTV
Kill My Time (Only available in America)