There seem to be a large number of people moving to Colorado lately, and like most states, we have our own special abbreviations. It helps to know these so you can understand people.
Here is a short list.

NoCo---Northern Colorado
SoCo---Southern Colorado
LoDo---Lower Downtown
FoCo---Fort Collins
LoCo---Boulder
HoJo---Howard Johnsons
PoPo---Police
SoSo---Meh
CoCo---Chocolate
DoDo---See LoCo
GoGo---70's dance
NoNo---Mistake
ToTo---Dorthy's dog
YoYo---Again, see LoCo

You're welcome

Earl