dirtbox derby Share definition Flag To do it up the arse with enthusiasm...as if heading for the finishing post on a racehorse. "She won't be sitting down for a week...I rode her in the dirtbox derby last night" dirtbox derby by drbollocks September 28, 2008 0 0 Get merch Get the dirtbox derby mug. Buy Now — $32.95 See more merch
