Moonbag is a crypto term often used by degens to mean a coin or an asset purchased in large units at a cheaper price is hoped to skyrocket in price in a nearest future.
“Bag” means a large units of the a coin’s total supply while “moon” means spike (pump, shoot).
So when you hope that your early bought large asset will pump, you can call it your moon bag.
And when giving a signal or alpha calls to others to buy, that’s a moon shot.