- Brit slang aggressive behaviour, esp by youths in a gang
WordReference Random House Unabridged Dictionary of American English © 2020
ag•gro (ag′rō),USA pronunciation n. [Brit. and Australian Informal.]
- British Termsaggressiveness, esp. that of an urban youth gang or gang member.
- British Termstrouble;
- 1965–70; construed as a shortening of either aggravation or aggression (or aggressive); see -o
Collins Concise English Dictionary © HarperCollins Publishers::
aggro /ˈæɡrəʊ/ n