/ ˈægrəʊ; NAmE ˈægroʊ/ noun [ U ] ( BrE , informal )
1.
violent aggressive behaviour :
Don't give me any aggro or I'll call the police.
2.
problems and difficulties that are annoying :
I had a lot of aggro at the bank.
••
WORD ORIGIN
1960s: abbreviation of aggravation (see aggravate ), or of aggression .