That word came from over hype guy at this forum i guess. And everyone else start using that word to replace HOLD. kinda funny though.
HODL It means that the price fluctuations associated with the crypto are so great and the expected return is also so great that you are going to want to ride through the downturns are take advantage of the price increases so hold in a meaning hold your coins and wrote HODL instead and went it quite viral afterwards it usually used in a context of not selling your coins i think so