Boarding School lingo for anyone younger than you, but normally reserved for the youngest pupils.
The term originally stems from a poem about 'Jumblies' by Edward Lear, and was intended to be affectionate, but has been corrupted overtime. First used at Quantock School (which has now closed)
In the last century, most of the working class had jobs and barely broke even after everything was said and done.
In this century, increasingly fewer people are employed and those hapless few that actually escape the unemployment roll after several months of living in destitute poverty will find that they all have Jubs... working like slaves in horrible working conditions doing menial drone work... still living in destitute povery... not breaking even. Welcome to 21st Century America... Get used to it... Now, get back to work!
Man hastily walking down sidewalk: Hey, ya lazy bum... get a Jub! Oh, sorry I didn't recognize you. Didn't I used to work for you at XYZ company? Jeez... you look like a wreck!
Man on street: Geez! Thanks for noticing. I do have a Jub. XYZ company just hired me back at 1/4 pay three months ago after laying me off a year and a half ago.