Couldn't stop laughing when I found this on the internet.
A dark, sticky food paste that has become a staple of the Australian diet. Made from brewer's yeast, it is a rich source of B vitamins. Brewer's yeast is a by-product of the beer brewing process. Consequently, an ample supply exists in Australia. Vegemite's flavour is extremely salty and remarkably strong. It is one of the few things the alcohol-numbed tongues of inebriated Aussies can actually taste, hence its popularity in its home market. However, that popularity has not transitioned to other countries. In many English speaking cultures, it's known as "Satan's Stool" or "Poo in a Jar".
Wizard of Oz: "Oi, mate! Care for some Vegemite?"
Sober Guy: "No thanks. I'd have to suck a koala's a** to get the taste out of my mouth."
by Fosters Forall November 03, 2009
(From the urban dictionary.)