(idiomatic, slang, UK) To behave in an arrogant or self-important manner; to boast.
The only thing they never saw was the window going in and we didn't do that, just the looting. Anyway, this clever plod gives it the big one and tells the judge he saw us do it.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
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