1. Jubb is a City of London word for a junior trader or assistant on a trading desk.
2. Jubb is also British slang term for the penis of a very fat man which is so hidden in the blubber that just the head sticks out.
1. “Oi Jubb, what’s my net long position in the back month?”.
2. “The guy next to me at the urinal tried to get his jubb out but had to give up in the end!”.