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1.
A British slang term describing a boisterous and usually drink-fuelled social state/attitude where persons "larging it" or "larging it up" are loud, noisy and playing around in a good humoured but macho way. Depending on the context, it can also be a way of squaring up against others without physical contact during real confrontations - a little bit like "mentally" sticking one's chest out as a sign of toughness, pretending to be tougher that one really is.
We were out on the town, drinking, larging it up, having a laugh.

When the bouncer grimaced at us and stared me in the eyes outside the nightclub, I went up to him, larging it up, saying, "What's your problem mate ?" He went "Boo !" to me, smiled, and said, "You're alright, you can come in !"
by TreeTox March 13, 2006