Jacksis
Jacksis means you're super lucky, like you won the lottery and got a free pizza, or it means you're the biggest smelly part of your body.
My teacher called me jacksis after I got an A on my test and then ate the whole class's lunch.
I called my brother jacksis after he won a race and then ate my homework.
My dog called me jacksis after I gave him a treat and then he ate my shoe.