dickaroo Share definition Flag Australian slang for fucking someones brains out, or giving them a sweet hunk of dick. Dean is such a butt fag. I'll give him the old dickaroo because I know he loves that Ausi cock mate. Eat my cock bitch!!! Cheerio mate! dickaroo by Stevo Ausibalz November 24, 2007 0 0 Get merch Get the dickaroo mug. Buy Now — $32.95 See more merch