| Noun | 1. | aggro - (informal British usage) aggravation or aggression; "I skipped it because it was too much aggro"colloquialism - a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech Britain, Great Britain, U.K., UK, United Kingdom, United Kingdom of Great Britain and Northern Ireland - a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom |