Pineapple Pocopo

A very rare sexual act/prank (that has very little to do with pineapples at all, curiously) in which the perpetrator hollows out a watermelon and by various means fills it up with vomit before they place it beside their bed. Later on, when they are fornicating with their partner in the doggy-style position and they are about to climax, they proclaim loudly, "Pineapple pocopo!" and take the hollowed out watermelon and smash it over their partner's head. It is preferable to do this when one's partner is intoxicated so as to confuse them but provide a reasonable explanation the next day about the presence of vomit and their raging headache.