'Mogging' is Collins' word of the year... but do you know what it means?

Summary
The slang term, which relates to outshining or upstaging someone, is one of 10 words celebrated.
Description from BBC News.
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'Mogging' is Collins' word of the year... but do you know what it means?
The slang term, which relates to outshining or upstaging someone, is one of 10 words celebrated.
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