Y2.1k Share definition Flag Y2K's lesser known brother, supposed to happen in the year 2010, which like Y2K was disproved over time (31/12/2009, 11:59:59 PM) "OMG it's Y2.1K! WE'RE ALL DOOOOOMED""oh, nothing happened...again" Y2.1k by billybob1236696 April 18, 2010 0 0 Get merch Get the Y2.1k mug. Buy Now — $32.95 See more merch
