Define Crave That Mineral Meaning

On October 27th, 2014, Tumblr user sixpenceee posted a photograph of an Alpine ibex (pretty much a goat) licking salt deposits off a nearly 90° mountainside with the caption “They crave that mineral”

to climb nearly 90 degree mountainsides to lick salt deposits off the stone

The supposed "Last meme of 2014" This picture of a Alpine Ibexe licking the side of a mountain wall for salt somehow gained popularity from of all places, Tumblr.