noun British and Australian Informal.

aggressiveness, especially that of an urban youth gang or gang member.
trouble; irritation.

Origin of aggro

1965–70; construed as a shortening of either aggravation or aggression (or aggressive); see -o Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for aggro



British slang aggressive behaviour, esp by youths in a gang

Word Origin for aggro

C20: from aggravation
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012