*"Tracky-dacks" is a very common Australian term for "Track-suit pants", also known as "Track pants" or "Sweat pants".
*"Tracky-dacks" is a very common Australian term for "Track-suit pants", also known as "Track pants" or "Sweat pants".
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*"Antipodean" means "Land on the other side of the world, when compared to the speaker." Since Gobberwart is Australian, one could guess that he is implying it's British.
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*"Antipodean" is also a generic term in comedy where a character is trying to sound smart, but really has no idea what they're saying.