Something that is way over the top cool. Like a man flying with a jetpack. The word 'awesome' is so over used and used to describe EVERYTHING, this give you an alternative if your adjective lexicon is limited to the the word 'awesome'.
A Jetpack, or "jetpacking" someone, refers to another elementary school or middle school hi jinx, in the same category as a swirly or wedgie. It involves the giver to take a carbon dioxide fire extinguisher, putting the spray end down the back of someone's pants, and emptying it.
OMG, Jason totally gave Billy Bob a Jetpack after a wedgie! That's one cold, sore ass!
Holy Crap,I got jetpacked by Brian the other day and it was Friggen' Cold!