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1.
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!
by Jane_22 April 29, 2005
 
2.
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..
by PinkMink June 17, 2007
 
3.
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!
by QuicheIsGay July 08, 2009
 
4.
homosexual
elton john is a yumbo
by anthony quinn July 21, 2003