noun
also ag·ro ˈag(ˌ)rō
( -s )
Etymology: by shortening & alteration from aggravation
1. Britain : exasperation : irritation
in any case it is not worth the aggro it causes — The Sun (London)
2. Britain : a rivalry or grievance especially public in nature marked by mistrust, rancor, and often violence
the railwaymen could cause trouble again in May … even if their aggro about inter-union differentials is resolved — Economist
3. Britain : violence against persons and property that is usually deliberate but not specific in its aims
shots fired and tyres let down as the aggro flares — Gilbert Johnson