Australian slang term meaning a "swag" (i.e., a pack of personal belongings). Originates from the Aussie folk song "Waltzing Matilda" in which the hobo ("swagman") refers to his precious swag as Matilda. Thus "waltzing matilda" literally means "walking across the outback".
From the Murrays green basin to the dusty outback I waltzed my matilda all over
Irish humorous term for a band of poorly-mannered and undisciplined folks
If I had a face like you, I would join the British Army