Wiktionary
happy little vegemite
alt. (context Australia English) A contented and well-behaved child; a very pleased person; ''often used ironically''. n. (context Australia English) A contented and well-behaved child; a very pleased person; ''often used ironically''.
Usage examples of "happy little vegemite".
We're both soaked to the skin and, I can tell you, Mole is not a happy little Vegemite.