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!
J - "It's been 12 hours... CalmDownU!
by J'sGirl October 09, 2006
by J'sGirl March 21, 2015