Green’s Dictionary of Slang

aggy adj.

(UK black) angry enough to fight.

hubpages.com ‘Roadman Slang 10 Jan. 🌐 Aggy - aggressively angry.
Twitter 23 Aug. 🌐 I, er, got quite aggy and called out the ‘safe routes’ [i.e. for imigrants] rubbish for the lie it is on TalkTV just now.