IELTS Energy 1178: IELTS Changes from an OG Examiner
IELTS Energy English 7+
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The Granddaddy of Something
OG stands for original gangster. But you're not literally talking about a gangster. This is an idiomatic expression we use to talk about anyone who's been involved in something the longest has been around the longest. Another phrase we use related to that is to call somebody the granddaddy of something.
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