Old King, in past, threatening action

• (informal British usage) aggravation or aggression
• Combative, slangily
• Violence in an attempt to capture king
• Bother with a horse, say, otherwise go back
• Violence in the past involving King George
• Trouble as wrecked Argo ships gallons
• Trouble as a horse runs over
• Violent behavior, in British slang

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
aggro \aggro\ n. 1. aggravation or aggression. [informal British usage] I skipped it because it was too much aggro

Wiktionary Word definitions in Wiktionary
1 (context Australia NZ slang English) angry. 2 (context online gaming MMORPG slang English) Liable to attack without being attacked first (said of monsters). 3 (context British US slang English) hardcore, aggressive. n. 1 aggravation; bother. 2 (context ...