noun. A nether-region-geddon that got hairy.
Real citation: "Sasha Grey… appeared naked on last night’s 'Entourage' and caused quite the commotion among the show’s dude-bro contingent. Not because she was naked on-camera… but because she went naked with a full-on bush. Judging from the resulting hysteria on Twitter, it was the Pube-pocalypse."
(Aug. 12, 2010, Newsgab, http://www.newsgab.com/celebrity-news-gossip/95045-sasha-grey-appeared-naked-last-night-s-entourage.html)
Made-up citation: "After rewatching Borat, I am certain that the long-prophesied pube-pocalypse will take place in Kazakhstan."