a synonym for yummy, tasty, delcicious, or any other words you use to describe something good.
Tim: This pizza is very yumbo!
Jane: I know!
Bad Hamburger popular in the 70's & 80's,
basically it's Ham and Cheese in a bun,
and served hot,
was available from most fast food restaurants,
Hungry Jacks (Australian Burger King) sold a version,
but took it off the menu several years ago..
this burger is worse than a Yumbo..
Word used to describe food that is both tasty and awesome.
"i just found a chocolate bar in my bag that i didnt no about... yumbo!"
*takes first glug of beer* - YUMBO!