To be wild, wrong or behaving in an insane manner.
When someone behaves ridiculously.
Also, when one is
jumpin they can be referred to as "on the moon with Mike
Busto"
And if someones jumpin
you tell em to look up.
"your
jumpin nigga"
"yo shut up"
"man your jumpin so high when i looked up
i seen you on the moon."
"yo fuck you"
"look
the fuck up."