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Commonly used as an excuse to get out of something you can't do and or when you previously had accepted a invitation to something but need to get out of it. Having a sister may or may not be true and she may or may not live in Freo. This is irrelevant as the emphasis is having a plausible excuse, not on actual fact.

Can be embellished with descriptive addiction as such as ...for a family do or to go watch a football match.

Feminine form of i need to take my little brother to baseball practice
"Damn, sorry to do this, but it can't make it this afternoon, I have to see my sister in Freo"
by Ttaym October 16, 2013
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