"Jubjub" was derived from the English expression "Lovely jubbly". "Jubbly" used alone does not
mean the same as 'lovely jubbly'. Generally, jubbly is used to describe someone who has done something stupid, silly, clumsy or
immature.
ex. "Gow, you're such a jubbly! I can't believe you've locked us out of the
car again!"
ex. "We are definitely
lost! Why haven't you stopped for directions? Gaa! When did you turn into such a jubbly?"
However, "jubjub" is a shortened, more affectionate derivative of "jubbly". It is used in an endearing fashion, usually with a loved one or child.