Meanings (ES + gloss)
divagar
Often followed by on: to speak or write (something) at length without any clear aim or point; to ramble.
Before getting down to the nitty gritty of beekeeping, most contributors to BBJ like to waffle on for a bit about the weather, the state of their garden or something equally incons…
Unless you have a great line in gags or repartee don't waffle on aimlessly to your audience, or make in-jokes among yourselves, the band or the compere/DJ.