HODL or “Hold on for dear life” is a meme typically used during price drops to galvanize holders and encourage them to not sell assets for losses.
The term HODL originates from the classic Bitcointalk forum, where a user mistakenly misspelled hold as hodl while admitting he is bad at trading.
Since then, it has become a popular meme and a trading strategy for some to hold onto their bags for dear life until the market hopefully recovers.