adj. Describes turning up en masse, usually in preparation for trouble like kicking the crap out of some other guys, or as a safety in numbers precaution to prevent exactly that. Also applies in work life, when you call a meeting and some dipshit brings 10 buddies, or you throw a party and some utter loser...brings 10 buddies.
"Fuck me if Chopper didn't turn up at the Red Lion mob handed last night looking to get even with Frankie Four Inches. By Last Orders no cunt was left standing in the place. Fucking carnage"