"HODL" is a misspelling of the word "hold," which originated from a forum post in 2013 by a Bitcoin investor who misspelled "hold" as "hodl" and wrote, "I AM HODLING."

Since then, "HODL" has become a popular term in the Bitcoin community and is often used to encourage others to hold onto their Bitcoin investments even during periods of volatility or price drops. It is seen as a long-term investment strategy that involves buying and holding onto Bitcoin for a long period of time, rather than selling it quickly in response to short-term price fluctuations.

As such, "HODL" has become part of the Bitcoin jargon, used by traders, investors, and enthusiasts to refer to the strategy of holding onto Bitcoin for the long-term, rather than engaging in short-term trading.