I have seen two posts regarding it because of course despite it being a requirement I do not find any single definition for it in the jam page, but unfortunately I don't think I have understood it well enough as the answers provided are unfortunately very case specific to the asker.
By some sense of the word I do not qualify as I have made a few games and participated in some game jams one week length like this one.
By other sense of the word, I can also be seen as a beginner as the quality of the games I made are not exactly great... and add to that the fact that I have not been making games for a while due to uni stuffs.
This jam's timing is perfect as it falls right as Christmas begins and my uni stuffs finally take a break; but of course I have to confirm first if I qualify.
A concise, concrete answer (e.g. have not participated in X jams with more than Y participants in the last Z months) that can be applied to most people wondering about the same thing would be appreciated.