It's an instuction:
Jingle, bells! Jingle, bells!
Jingle all the way!
You're telling those bells to jingle, jingle all the way. But I always thought it was a description of the type of bells that is "jingle bells" which are said to, in fact, jingle all the way.
Jingle-bells, jingle-bells,
Jingle all the way.
Sleigh bells existed because brakes did not. They were the equivalent of someone holding down their car horn as they careened through an intersection.
Whenever you hear them in Christmas music, remember, that merry jingling conveys a simple message: "Get the fuck out of my way."
"Get the fuck,
Get the fuck,
Fuck out of my way,
Oh what fun it is to dodge,
people living out their days!"