Throughout the seasons of NCIS, the characters (mainly Abby) drink a coffee named Caf-Pow:
Being from outside US, at first I thought it's a known/existing brand, and didn't pay much attention to it. But when trying to search to see what this really is, turned out it's just a fictional name.
So my question is: what is the origin of this name? Caf is obviously for "Caffè", but what's the "Pow" stand for?