So many bloggers use the term "Jam on!" So I've sent a message to Animal Jam HQ asking what it meant and here is their reply:
The definition for "Jam on!" can closely be associated with the
term "Right on!" or "Rock on!" The term is used as a sense of general
encouraging or positive exclamation.
Now we know the exact meaning of this term that is used in many blogs and videos and is one of the many phrases in Safe Chat.
Jam on Jammers!