Rubbing your head on a person's navel erotically while dancing.
"Yo, why he have to be navelling on you all night long?"
Traipsing joyfully through public fountains or water features, generally with a group of friends, and often in a flirtatious or playful manner.
During their last evening together, the travellers removed their shoes and enjoyed some well-deserved fountain-frolicking before heading back to their rooms.