The phrase that associated with each bingo number, often rhyming or onomatopoeic. As well as the entertainment value and crowd-participation that this encouraged, it was a way to ensure that numbers were heard over the noise of a crowded hall. Many nicknames fell out of popularity for politically correct or socially conscious reasons, and have been discontinued nearly entirely with the event of computer drawn bingo. Why not make your own up when you play online bingo? :-)