The story
Possibly popularized by the subreddit r/meatcrayon (created December 15, 2018).
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Someone who gets injured in an extremely gory manner as a result of rubbing or impacting the ground at high speeds (comparing one's injuries to the marks left by a crayon). Full definition →
Possibly popularized by the subreddit r/meatcrayon (created December 15, 2018).
Etymology from Wiktionary, CC BY-SA 4.0.