The Tumblr dashboard, shortened — 'my dash' — as the feed of the platform that had feelings about everything, and 'dash' as a place: 'this is all over my dash'. The record's entry for the timeline of the other website, and for the era when it mattered.
Since 2008 this has meant one thing in the group chat and another on a corporate account. The dictionary should probably track both, and note which one killed it.
My dash in 2012 was Sherlock, Homestuck and a girl in Ohio I never met. The record notes the dash is still there and that the girl is a dentist.
What does it mean? Write it the way you would say it out loud.
