Calidown 

When California sinks into the ocean.

In the movie "2012" there is an instance of Calidown

Calidown by RealComicalDude December 2, 2016

CalmDownU 

When you get really excited about something, usually referring to Love, and your boyfriend has to remind you to calm down.

J'sGirl - "Baby,I really miss you, I haven't seen you since yesterday."

J - "It's been 12 hours... CalmDownU!

CalmDownU by J'sGirl October 10, 2006