The phrase comes from Harry Nilsson's 1971 song Coconut, from his album Nilsson Schmilsson, where a singer and a doctor trade lines about curing a bellyache with lime and coconut. The simple, repetitive lyric made it easy to remember and sing along to, and it has lived on through films, adverts and cover versions over the decades. Online, short clips of the hook are reused as a lighthearted reaction, especially in cooking, travel and party edits, because the line is instantly recognisable even out of context.