This is one of David's older publications (1985), and difficult to find in good condition.
I've tried to locate the source for this title, but all I can find is..
Potami is a small village near Nicosia with a population of approximately 558 people. Legend says that the village was created by a king who was buried in the village in a golden carriage.
The name of the village probably comes from the two rivers which the village is built between.
So I'm guessing it's a nickname for 'Hot Hippos'